ClassID:

86656

C02F2303/14 - CPC Classification

Classification description:

Specific treatment goals Maintenance of water treatment installations

Recent Application in this class:
#1
20260132648
2026-05-14

POOL CLEANER WITH EDGE ENGAGEMENT ASSEMBLY

#2
20260109624
2026-04-23

LIQUID CIRCULATING SYSTEM

#3
20260103413
2026-04-16

WATER TREATMENT APPARATUS AND METHOD FOR CONTROLLING SAME

#4
20260102883
2026-04-16

WRENCH ASSEMBLY FOR WATER TREATMENT SYSTEM

#5
20260078018
2026-03-19

WASTEWATER SCREEN FILTER AND VIBRATION MONITOR

#6
20260070811
2026-03-12

ENABLING INTERNET OF THINGS (IoT) CAPABILITIES IN LEGACY WATER TREATMENT SYSTEMS

#7
20260062318
2026-03-05

WATER MONITORING SYSTEM WITH CALCIUM HARDNESS MEASUREMENT

#8
20260049012
2026-02-19

AUTOMATED RAINFALL FLOCCULANT DISBURSEMENT STRUCTURE FOR SEDIMENT AND EROSION CONTROL

#9
20260015273
2026-01-15

Methods and Systems for Onsite Wastewater Treatment and Reuse

#10
20260001042
2026-01-01

METHOD FOR PREDICTING A MAINTENANCE OPERATION AND RECOMMENDING MAINTENANCE FOR WATER TREATMENT EQUIPMENT

#11
20250360442
2025-11-27

POST FILTER SET CONFIGURATION FOR A WATER TREATMENT OPERATION AND MAINTENANCE METHODS

#12
20250327325
2025-10-23

POOL-CLEANING ROBOT

#13
20250312522
2025-10-09

PORT ARRANGEMENT, A PURIFIED WATER PRODUCING APPARATUS COMPRISING THE PORT ARRANGEMENT AND A METHOD FOR PERFORMING PORT CLEANING OF A PURIFIED WATER PRODUCING APPARATUS

#14
20250256990
2025-08-14

LARGE SCALE DESALINATION PROCESS

#15
20250243085
2025-07-31

WATER PURIFICATION DEVICE CAPABLE OF SUPPRESSING SCALE ADHESION

#16
20250197247
2025-06-19

HYBRID FILTER AND SYSTEMS AND METHODS FOR ISOLATING MODULES

#17
20250128969
2025-04-24

FLUID TREATMENT APPARATUS WITH INTEGRAL CLEANING SYSTEM

#18
20250100902
2025-03-27

EFFLUENT LIQUID EVAPORATOR

#19
20250091916
2025-03-20

WATER STERILISER

#20
20250065280
2025-02-27

DOMESTIC APPLIANCE FOR DISPENSING DRINKING WATER

#21
20250011197
2025-01-09

WATER TREATMENT APPARATUS AND METHOD FOR CONTROLLING THE SAME

#22
20240416396
2024-12-19

UNDERDRAIN FOR MEDIA VESSEL AND METHOD OF CLEANING

#23
20240408546
2024-12-12

SUBMERGED WATER DESALINATION SYSTEM MOTOR COOLED WITH PRODUCT WATER

#24
20240351921
2024-10-24

METHOD FOR PREVENTING AND TREATING POLLUTION PLUME MIGRATION OF PERMEABLE REACTIVE BARRIER

#25
20240286926
2024-08-29

WATER TREATMENT UNIT AND METHOD OF CLEANING A WATER TREATMENT UNIT

#26
20240262721
2024-08-08

ELECTROLYZED WATER SPRAY DEVICE

#27
20240238699
2024-07-18

APPARATUS FOR PREVENTING IMPURITIES IN A WASHING FLUID FROM CLOGGING AN UNDERDRAIN AND METHODS FOR PREVENTING CLOGGING OF THE UNDERDRAIN AND/OR MONITORING THE APPARATUS

#28
20240228331
2024-07-11

LIQUID TREATMENT METHOD AND APPARATUS

#29
20240207497
2024-06-27

Port arrangement, a purified water producing apparatus comprising the port arrangement and a method for performing port cleaning of a purified water producing apparatus

#30
20240199446
2024-06-20

On-site destruction of recalcitrant perfluoroalkyl substances by molecular sieves

#31
20240166536
2024-05-23

ELECTROLYZED WATER GENERATOR AND METHOD FOR CONTROLLING ELECTROLYZED WATER GENERATOR

#32
20240124334
2024-04-18

AN ELECTROCHEMICAL REACTOR SYSTEM WITH MEANS FOR THE MAINTENANCE AND CLEANING THEREOF

#33
20240059595
2024-02-22

PROCESS FOR MANAGING WORMS IN MEMBRANE AERATED BIOFILM

#34
20240058730
2024-02-22

WATER-FILTRATION DEVICE

#35
20240043299
2024-02-08

Devices for controlling to remove food waste digestion foam

#36
20240010522
2024-01-11

SCREENING DEVICE FOR USE IN COARSE MATTER SCREENING WELLS OF A WASTE WATER TREATMENT PLANT

#37
20240002263
2024-01-04

WATER SOFTENING DEVICE, RECYCLING METHOD FOR WATER SOFTENING DEVICE, AND METHOD FOR CLEANING WATER SOFTENING DEVICE

#38
20230415063
2023-12-28

MODULAR HORIZONTAL TUBE EVAPORATOR UNIT, CLEANING DEVICE, EVAPORATOR AND CLEANING APPLICATION METHOD

#39
20230399249
2023-12-14

WATER TREATMENT METHOD AND WATER TREATMENT APPARATUS

#40
20230357061
2023-11-09

Eroding assembly for chlorinator with removable sieve and weir

#41
20230339786
2023-10-26

SYSTEMS AND METHODS OF OPERATING WATER FILTRATION SYSTEMS

#42
20230332089
2023-10-19

Bioreactor cleaning installation for bioreactors in rail vehicles

#43
20230287699
2023-09-14

WATER DISTRIBUTION DEVICE FOR MAINTENANCE OF AN ARTIFICIAL BASIN

#44
20230257291
2023-08-17

APPARATUS FOR CONTINUOUS HEAT AND PRESSURE PROCESSING OF A FLUID

#45
20230233994
2023-07-27

FORWARD OSMOSIS FILTRATION CELL, AND METHODS OF FILTERING WATER WITH A FORWARD OSMOSIS FILTRATION CELL

#46
20230212930
2023-07-06

OILFIELD WATER STORAGE SYSTEMS, METHODS OF MANAGING THE SAME, AND FILM-FORMING COMPOSITIONS

#47
20230202888
2023-06-29

MANAGEMENT METHOD FOR WATER TREATMENT DEVICE, REPLACEMENT METHOD FOR WATER TREATMENT MEMBER, AND LIFE EXPECTANCY ESTIMATION METHOD FOR WATER TREATMENT MEMBER

#48
20230202881
2023-06-29

Water treatment tank with conductivity monitor

#49
20230192518
2023-06-22

ANAEROBIC DIGESTER WITH SELF-DELIVERY OF ACCUMULATED SOLIDS

#50
20230191276
2023-06-22

Apparatus and method for concentrating a fluid

#51
20230174402
2023-06-08

Method for controlling accretion of scale

#52
20230150835
2023-05-18

DIGITAL MODEL BASED REVERSE OSMOSIS PLANT OPERATION AND OPTIMIZATION

#53
20230072206
2023-03-09

GRANULAR SLUDGE REACTOR SYSTEM COMPRISING AN EXTERNAL SEPARATOR

#54
20230036931
2023-02-02

Method for disinfection and function control of a chlorine sensor

#55
20230025170
2023-01-26

System and method of deionization of water

#56
20220356080
2022-11-10

On-site destruction of recalcitrant perfluoroalkyl substances by molecular sieves

#57
20220306500
2022-09-29

Method and systems for oxygenation of water bodies

#58
20220266198
2022-08-25

Thermal energy conversion submerged reverse osmosis desalination system

#59
20220250951
2022-08-11

Submerged water desalination system pump lubricated with product water

#60
20220250950
2022-08-11

SUBMERGED WATER DESALINATION SYSTEM WITH PRODUCT WATER PUMP CAVITATION PROTECTION

#61
20220250006
2022-08-11

Adhesively-bonded water separation cartridge module

#62
20220228054
2022-07-21

FLUORESCENT NAPHTHALIMIDE POLYMERS AND SOLUTIONS THEREOF FOR SCALE CONTROL IN AQUEOUS SYSTEMS

#63
20220212971
2022-07-07

Wash water processing apparatus and sterilization and water-purification apparatus, and wash water processing method

#64
20220212960
2022-07-07

SLEEVE BREAK DETECTOR FOR UV DISINFECTION SYSTEM LAMP ASSEMBLY

#65
20220204363
2022-06-30

Reusable composite filter material and methods for making and using the same for removing and destroying molecular contaminants from water

#66
20220194822
2022-06-23

Apparatus for generating chlorine disinfectant

#67
20220185706
2022-06-16

MONITORING OF MEMBRANE FOULING

#68
20220177329
2022-06-09

Water Softener System

#69
20220163957
2022-05-26

Method for detecting anomalies in a water treatment plant using an apparatus for injecting oxygen into a waste pool

#70
20220153618
2022-05-19

METHOD FOR DETECTING ANOMALIES IN A WATER TREATMENT PLANT

#71
20220152529
2022-05-19

Immersed active infrared self-cleaning secondary sedimentation tank sludge blanket induction device and application method thereof

#72
20220135460
2022-05-05

Process for treating sludge

#73
20220113178
2022-04-14

Water softener salt monitoring system

#74
20220105474
2022-04-07

Air burst system for cleaning submerged screen intake

#75
20220080371
2022-03-17

DEVICE FOR INJECTING FLUID INTO A LIQUID, METHOD FOR CLEANING SAID DEVICE, AND EFFLUENT TREATMENT INSTALLATION

#76
20210300793
2021-09-30

WATER DISINFECTION SYSTEM

#77
20210270723
2021-09-02

Method and device for the detection and monitoring of surface fouling

#78
20210253462
2021-08-19

Multi plate screw press sludge dewatering machine

#79
20210252439
2021-08-19

Water-treating ceramic filter unit

#80
20210252435
2021-08-19

Rag seeding in wastewater treatment systems

#81
20210244004
2021-08-12

APPARATUS FOR INJURING OR KILLING UNDESIRED ORGANISMS IN WATER

#82
20210221703
2021-07-22

Water main recirculating system with filter by-pass and isolation and method of using same

#83
20210220775
2021-07-22

Modularized subsea seawater desalination system

#84
20210197128
2021-07-01

METHOD FOR HEALING DAMAGED SEPARATION MEMBRANE FOR WATER TREATMENT USING SURFACE-FUNCTIONALIZED SILICA MICROPARTICLES

#85
20210130192
2021-05-06

Perforated screen conversion kit

#86
20210008500
2021-01-14

Device for processing water, system, and methods

#87
20200398226
2020-12-24

Air burst system for cleaning submerged screen intake

#88
20200361789
2020-11-19

Water treatment system

#89
20200354245
2020-11-12

Aeration diffuser system, wastewater treatment system including same, and associated monitoring method

#90
20200345917
2020-11-05

Port arrangement, a purified water producing apparatus comprising the port arrangement and a method for performing port cleaning of a purified water producing apparatus

#91
20200339438
2020-10-29

Water treatment system

#92
20200338481
2020-10-29

Water treatment system

#93
20200325050
2020-10-15

Method and Device for Biological Waste Water Purification

#94
20200325038
2020-10-15

Fluid injection filtration system

#95
20200277777
2020-09-03

Cesspool and liner

#96
20200254368
2020-08-13

METHOD FOR UNCLOGGING AN EXTRUDER

#97
20200216333
2020-07-09

System and method of deionization of water

#98
20200197840
2020-06-25

OPEN BOTTOM MULTIPLE CHANNEL GAS DELIVERY DEVICE FOR IMMERSED MEMBRANES

#99
20200156957
2020-05-21

MEDIA EXTRACTING APPARATUS FOR A WATER TREATMENT SYSTEM TANK AND METHOD

#100
20200095150
2020-03-26

Automated waste water recycling system using advanced electro-coagulation unit

#101
20200095149
2020-03-26

Automated waste water recycling system using advanced electro-coagulation unit

#102
20200071213
2020-03-05

Process for managing worms in membrane aerated biofilm

#103
20200055750
2020-02-20

System for providing treated water

#104
20190218123
2019-07-18

Pressostatic odor control cover for slurry treatment tank with device for reducing the inner volume occupied by harmful and malodorous gases

#105
20190218110
2019-07-18

SYSTEMS AND METHODS FOR CLEANING WATER FILTRATION SYSTEMS

#106
20190161363
2019-05-30

Fluid treatment tank having air blocker

#107
20190128541
2019-05-02

Method for treating domestic water supply installations

#108
20190119077
2019-04-25

Method for operating lifting set including lifting apparatus and water device

#109
20190112202
2019-04-18

Method for dosing antiscalant into a membrane-based water treatment system

#110
20190106332
2019-04-11

Fluid injection filtration system

#111
20190084846
2019-03-21

System for treating water

#112
20190055144
2019-02-21

Electrolytic liquid generation device

#113
20190025267
2019-01-24

Automated titration in a recirculating fluid system

#114
20190010070
2019-01-10

Membrane separation process

#115
20180346362
2018-12-06

Multi plate screw press sludge dewatering machine

#116
20180344081
2018-12-06

Filter assembly for use in a fluid container of a domestic appliance

#117
20180273399
2018-09-27

Hydraulic control and treatment device, particularly for hydraulic apparatuses or systems

#118
20180251386
2018-09-06

Subsea equipment cleaning system and method

#119
20180194643
2018-07-12

Radium removal from aqueous media using zeolite materials

#120
20180187318
2018-07-05

ELECTRODE FOR ELECTROCHLORINATION

#121
20180179084
2018-06-28

AUTO DIAGNOSTIC SENSOR BASED WATER PURIFICATION SYSTEM

#122
20180170768
2018-06-21

Water purifier

#123
20180093906
2018-04-05

CHEMICAL FEEDER INCLUDING DILUTION CONTROL SYSTEM

#124
20180075399
2018-03-15

Method and apparatus for predicting depletion of deionization tanks and optimizing delivery schedules

#125
20170216777
2017-08-03

Method and apparatus for cleaning filter membrane, and water treatment system

#126
20170190603
2017-07-06

Inhibtion of silica scale using hydrophobically-modified alkylene oxide urethane copolymer

#127
20170121199
2017-05-04

INDUSTRIAL WATER LOOP TREATMENT PROCESS

#128
20170121194
2017-05-04

Device for purifying cropland effluents

#129
20170088448
2017-03-30

SELF-REGENERATING BIOFILTER

#130
20170035921
2017-02-09

Refraction technology system

#131
20170022075
2017-01-26

Apparatus for electrocoagulation treatment of a liquid

#132
20170022074
2017-01-26

Method and apparatus for recharging a deionization vessel

#133
20170015573
2017-01-19

Removable nozzle assembly and gas transfer system

#134
20160368796
2016-12-22

Seawater pretreatment device

#135
20160311706
2016-10-27

Electrolysis water-making apparatus

#136
20160304362
2016-10-20

Radiation source module and fluid treatment system

#137
20160303621
2016-10-20

Method for sterilizing water treatment apparatus having plurality of tanks

#138
20160251246
2016-09-01

Diffusion pipe and method for cleaning diffusion pipe

#139
20160214039
2016-07-28

Nozzle-brush automatic cleaning filter with motor reducer

#140
20160176729
2016-06-23

CDI type water treatment apparatus

#141
20160167989
2016-06-16

Method of cleaning a drinking water supply device

#142
20160096748
2016-04-07

Optical fluid treatment device

#143
20160075580
2016-03-17

Method for removing scales in steam generation facility

#144
20160052801
2016-02-25

UV lamp module with exchangeable lamp units

#145
20160046516
2016-02-18

Diffused aeration systems and methods for cleaning fouled diffusers in aeration systems

#146
20160030986
2016-02-04

Washing device for water treatment apparatus and washing method thereof

#147
20160030985
2016-02-04

Washing device for water treatment apparatus and washing method thereof

#148
20160023926
2016-01-28

Method and system for injecting RF signal into a fluid-containing system

#149
20150321934
2015-11-12

WATER PRODUCTION METHOD

#150
20150290563
2015-10-15

Open bottom multiple channel gas delivery device for immersed membranes

#151
20150218024
2015-08-06

Water treatment devices

#152
20150191369
2015-07-09

Hardness reduction apparatus and method

#153
20150122498
2015-05-07

Method and device for concentrating dissolved solids in flowback and produced water from natural gas wells

#154
20150108372
2015-04-23

UV water treatment plant with open channel

#155
20150100169
2015-04-09

Wastewater use and monitoring system

#156
20150068964
2015-03-12

Magnetic filtration device

#157
20150048019
2015-02-19

Vertical pressurized immersion membrane filtration system

#158
20150041416
2015-02-12

Fluid injection filtration system

#159
20150041408
2015-02-12

Fluid injection filtration system

#160
20150027947
2015-01-29

Activated sludge treatment method, and method for upgrading existing waste water treatment equipment using said method

#161
20140217000
2014-08-07

System including a water treatment tank and a device for interfering with the removal of a riser tube from the water treatment tank

#162
20140191137
2014-07-10

Anti-fouling surface, and radiation source assembly and fluid treatment system comprising same

#163
20140144845
2014-05-29

Method for water treatment regeneration stage

#164
20140116928
2014-05-01

Water treatment system

#165
20140110338
2014-04-24

Water treatment apparatus and method

#166
20140096799
2014-04-10

Method for sterilizing water treatment apparatus having plurality of tanks

#167
20140086565
2014-03-27

Selective water temperature component for use with water treatment systems

#168
20140042073
2014-02-13

LIQUID FILTER HOUSING WITH HANDLES

#169
20140042019
2014-02-13

Electrolysis device integrating rectifier

#170
20130284649
2013-10-31

Advanced on-site water sanitization system having chlorine generation integrated with copper/silver ionization

#171
20130234037
2013-09-12

Radiation source assembly

#172
20130146449
2013-06-13

Electrolysis water-making apparatus

#173
20130092614
2013-04-18

Wedge-shaped and stackable filter cartridges

#174
20130075310
2013-03-28

Device for producing ultrapure water

#175
20120292318
2012-11-22

Tank facility with side access

#176
20120292234
2012-11-22

Water enhancement system

#177
20120217815
2012-08-30

Method and system for injecting RF signal into a fluid-containing system

#178
20120168357
2012-07-05

Liquid filter device

#179
20120103917
2012-05-03

Water treatment apparatus and a method for cleaning a filter layer of a water treatment apparatus

#180
20120097889
2012-04-26

Wastewater treatment compositions

#181
20120097618
2012-04-26

Aeration control valve system for water treatment system and methods for using same

#182
20120087845
2012-04-12

STEAM STERILIZATION SYSTEM FOR A WATER PURIFIER

#183
20120086136
2012-04-12

AERATION APPARATUS AND SEAWATER FLUE GAS DESULPHURIZATION APPARATUS INCLUDING THE SAME

#184
20120085239
2012-04-12

AERATION APPARATUS WITH ATOMIZING UNIT AND SEAWATER FLUE GAS DESULPHURIZATION APPARATUS INCLUDING THE SAME

#185
20120067377
2012-03-22

Washing device for water treatment apparatus and washing method thereof

#186
20110301072
2011-12-08

METHOD OF REDUCING CORROSION USING A WAREWASHING COMPOSITION

#187
20110290706
2011-12-01

Water purifying apparatus having cleaning system

#188
20110278467
2011-11-17

Water purifier

#189
20110266216
2011-11-03

Method for sanitizing an electrodeionization device

#190
20110240880
2011-10-06

FLUID TREATMENT SYSTEM

#191
20110215041
2011-09-08

Magnetic separation apparatus and waste water treatment apparatus

#192
20110192428
2011-08-11

WASTEWATER TANK STORAGE TREATMENT

#193
20110180487
2011-07-28

Optimized Water Treatment Installation and Process

#194
20110180395
2011-07-28

Advanced chlorine generating system

#195
20110160114
2011-06-30

CLEANING COMPOSITIONS CONTAINING WATER SOLUBLE MAGNESIUM COMPOUNDS AND METHODS OF USING THEM

#196
20110079243
2011-04-07

SCALE CONDITIONING AGENTS AND TREATMENT METHOD

#197
20110070123
2011-03-24

CORROSION REDUCTION SYSTEM FOR POWER GENERATION PLANTS DURING SHUTDOWN

#198
20110068060
2011-03-24

Waste water treatment systems and methods

#199
20110059241
2011-03-10

Method of using sulfur-based corrosion inhibitors for galvanized metal surfaces

#200
20110049060
2011-03-03

INDICATORS PRINCIPALLY FOR USE IN CONNECTION WITH WATER-TREATMENT MATERIALS FOR POOLS AND SPAS

#201
20100294703
2010-11-25

Water enhancement system

#202
20100247374
2010-09-30

DEVICE FOR MAKING A LIQUID SAFE BY ULTRAVIOLET RADIATION AT THE DISPENSING POINT AND METHOD FOR MAKING A LIQUID SAFE

#203
20100234262
2010-09-16

Cleaning compositions containing water soluble magnesium compounds and methods of using them

#204
20100219203
2010-09-02

Friendly dispensers

#205
20100219137
2010-09-02

Water treatment apparatus and method

#206
20100212349
2010-08-26

Refrigeration Device Comprising a Water Filter

#207
20100200522
2010-08-12

System for water treatment regeneration stage

#208
20100176071
2010-07-15

Water treatment apparatus and a method for cleaning a filter layer of a water treatment apparatus

#209
20100175997
2010-07-15

Method of purifying water and apparatus therefor

#210
20100173820
2010-07-08

Compositions including hardness ions and gluconate and methods employing them to reduce corrosion and etch

#211
20100163468
2010-07-01

WATER TREATMENT APPARATUS

#212
20100155341
2010-06-24

Method of treating water and aqueous systems in pipes with chlorine dioxide

#213
20100143187
2010-06-10

DRINKING WATER SYSTEMS MONITORING AND CLEANING METHOD

#214
20100059358
2010-03-11

POTABLE WATER DISTILLER

#215
20090294689
2009-12-03

Fluid treatment system

#216
20090261028
2009-10-22

Magnetic field forming device for active water and fluid treatment apparatus using the same

#217
20090242484
2009-10-01

ENVIRONMENTALLY FRIENDLY HYBRID MICROBIOLOGICAL CONTROL TECHNOLOGIES FOR COOLING TOWERS

#218
20090206019
2009-08-20

WATER TREATMENT APPARATUS

#219
20090175758
2009-07-09

WASTEWATER TANK STORAGE TREATMENT

#220
20090149363
2009-06-11

Compositions including hardness ions and gluconate and methods employing them to reduce corrosion and etch

#221
20090071891
2009-03-19

Dispensing system

#222
20080300160
2008-12-04

Compositions including magnesium ion, calcium ion, and silicate and methods employing them to reduce corrosion and etch

#223
20080287335
2008-11-20

Compositions including hardness ion and threshold agent and methods employing them to reduce corrosion and etch

#224
20080287334
2008-11-20

Compositions including Ca and Mg ions and gluconate and methods employing them to reduce corrosion and etch

#225
20080280800
2008-11-13

Cleaning compositions with water insoluble conversion agents and methods of making and using them

#226
20080276967
2008-11-13

Cleaning compositions containing water soluble magnesium compounds and methods of using them

#227
20080274939
2008-11-06

WATER TREATMENT SYSTEM AND DOWNSTREAM CLEANING METHODS

#228
20080274933
2008-11-06

Mg++ chemistry and method for fouling inhibition in heat processing of liquid foods and industrial processes

#229
20080274932
2008-11-06

COMPOSITION FOR IN SITU MANUFACTURE OF INSOLUBLE HYDROXIDE WHEN CLEANING HARD SURFACES AND FOR USE IN AUTOMATIC WAREWASHING MACHINES AND METHODS FOR MANUFACTURING AND USING

#230
20080274930
2008-11-06

Method of reducing corrosion using a warewashing composition

#231
20080274928
2008-11-06

WATER SOLUBLE MAGNESIUM COMPOUNDS AS CLEANING AGENTS AND METHODS OF USING THEM

#232
20080260602
2008-10-23

FLUID TREATMENT SYSTEM AND RADIATION SOURCE MODULE FOR USE THEREIN

#233
20080156711
2008-07-03

Water filter assembly and filter cartridge for use therewith

#234
20080145271
2008-06-19

METHOD OF USING SULFUR-BASED CORROSION INHIBITORS FOR GALVANIZED METAL SURFACES

#235
20080142451
2008-06-19

Automated apparatus and process for the controlled shutdown and start-up for a wastewater treatment system

#236
20080087610
2008-04-17

Water circulation systems for ponds, lakes, and other bodies of water

#237
20080087586
2008-04-17

WATER CIRCULATION SYSTEMS FOR PONDS, LAKES, AND OTHER BODIES OF WATER

#238
20080034846
2008-02-14

Automated sanitation

#239
20080023411
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