F02F5/00 - CPC Classification Index

#1

20260117867

2026-04-30

PISTON RING SET

#2

20260055813

2026-02-26

OIL CONTROL RING

#3

20250320919

2025-10-16

PISTON RING WITH TRAPEZOIDAL OPENING

#4

20250230780

2025-07-17

Piston Assembly with Gapless Oil Control Ring

#5

20250109722

2025-04-03

Piston Unit, Top Land Member, and Combination of Piston Unit Parts

#6

20240003314

2024-01-04

Piston assembly with gapless oil control ring

#7

20230046714

2023-02-16

Piston sealing mechanism for a circulating piston engine

#8

20220290629

2022-09-15

Air-fuel system for a circulating piston engine

#9

20220090558

2022-03-24

Combined oil ring

#10

20210270370

2021-09-02

Piston ring

#11

20210140542

2021-05-13

Piston seal with solid lubricant applicator

#12

20210131487

2021-05-06

Bearing assembly

#13

20210062916

2021-03-04

Piston assembly for an internal combustion engine of a motor vehicle

#14

20200378498

2020-12-03

Play-free oil scraper ring

#15

20200309263

2020-10-01

Piston ring

#16

20200300361

2020-09-24

Piston for an internal combustion engine

#17

20200141350

2020-05-07

Air-fuel system for a circulating piston engine

#18

20200124175

2020-04-23

Piston-integrated gap cover

#19

20200096103

2020-03-26

Flutter-suppression piston ring

#20

20200056700

2020-02-20

Sliding member and piston ring

#21

20200003130

2020-01-02

Supporting arrangement for an eccentric member of an adjusting arrangement, and adjusting arrangement

#22

20190376467

2019-12-12

Piston ring

#23

20190078591

2019-03-14

Stamp-sealing unit and ultrasonic processing device comprising same

#24

20190049011

2019-02-14

Piston seal with solid lubricant applicator

#25

20190049010

2019-02-14

Piston ring

#26

20190049008

2019-02-14

Piston-integrated gap cover

#27

20180299011

2018-10-18

Pressure ring

#28

20180216570

2018-08-02

Piston for an internal combustion engine

#29

20180209541

2018-07-26

Piston ring and its production method

#30

20180187781

2018-07-05

Sliding member and piston ring

#31

20180187780

2018-07-05

Piston ring for combustion engine

#32

20180180182

2018-06-28

Piston ring

#33

20180180181

2018-06-28

Piston ring and manufacturing method therefor

#34

20180112775

2018-04-26

Combined oil control ring

#35

20180080556

2018-03-22

Piston ring

#36

20180031127

2018-02-01

Side rail

#37

20180023702

2018-01-25

Oil ring

#38

20180017159

2018-01-18

Piston ring

#39

20170350508

2017-12-07

Combined oil control ring

#40

20170227126

2017-08-10

Combined oil ring

#41

20170175622

2017-06-22

Sliding element

#42

20170167609

2017-06-15

Piston ring

#43

20160245407

2016-08-25

Piston ring

#44

20160186860

2016-06-30

Highly heat conductive piston ring for internal combustion engine

#45

20160153392

2016-06-02

Sliding assembly

#46

20160067831

2016-03-10

Wire for I-shape oil rings and producing method of the same

#47

20150330507

2015-11-19

Piston ring sprayed coating, piston ring, and method for producing piston ring sprayed coating

#48

20150330333

2015-11-19

Unburned fuel venting in internal combustion engines

#49

20150323073

2015-11-12

Reduced friction piston rings

#50

20150308573

2015-10-29

Piston ring

#51

20150300493

2015-10-22

Combination of cylinder and piston ring

#52

20150226327

2015-08-13

Piston ring

#53

20150198249

2015-07-16

Taper-faced compression ring and wire therefor

#54

20140260959

2014-09-18

WEAR RESISTANT PISTON RING COATING

#55

20140225329

2014-08-14

Piston ring

#56

20140137733

2014-05-22

Piston ring

#57

20140096736

2014-04-10

PISTON RING WITH COMPOSITE COATING

#58

20140076265

2014-03-20

Piston ring for two-stroke engines

#59

20130307220

2013-11-21

Oil scraper ring

#60

20130291824

2013-11-07

Oil scraper ring

#61

20130213222

2013-08-22

Piston ring for an internal combustion engine

#62

20130207350

2013-08-15

Engine

#63

20130147124

2013-06-13

Oil-reserving piston ring

#64

20130119614

2013-05-16

COMPENSATING AND SEALING RINGS FOR PISTONS OF ENGINES, COMPRESSORS, EXHAUSTERS AND PUMPS

#65

20130062835

2013-03-14

Compression ring and its production method

#66

20130032119

2013-02-07

Two-piece compression piston ring of an internal combustion engine

#67

20130014725

2013-01-17

Internal Combustion Engine

#68

20110113873

2011-05-19

Apparatus and method for monitoring sliding state of piston

#69

20100181731

2010-07-22

Wire for I-shape oil rings and producing method of the same

#70

20100162987

2010-07-01

Piston device for internal combustion engines

#71

20090020958

2009-01-22

METHODS AND APPARATUS FOR OPERATING AN INTERNAL COMBUSTION ENGINE

#72

20080060604

2008-03-13

Internal combustion engine

#73

20070193553

2007-08-23

Internal combustion engine

#74

20070193552

2007-08-23

Internal combustion engine

#75

20070193551

2007-08-23

Internal combustion engine

#76

20070193550

2007-08-23

Internal combustion engine

#77

20070193549

2007-08-23

Internal combustion engine