D21F1/44 - CPC Classification Index

ClassID:

126547 ⎘

D21F1/44 - CPC Classification

Classification description:

Wet end of machines for making continuous webs of paper Watermarking devices

Sub-classes:

D21F1/46 » Dandy rolls 5

Recent Application in this class:

20240287739

2024-08-29

MICRO-OPTIC SECURITY DEVICE WITH ENHANCED WET-HARVEST RESISTANCE

20230037506

2023-02-09

Paper forming mold, mold manufacturing method, and paper manufactured by forming mold

20200173107

2020-06-04

Device for generating a pattern on a clothing for a machine for manufacturing a web material

20200087858

2020-03-19

DEVICE FOR GENERATING A PATTERN ON A CLOTHING FOR A MACHINE FOR MANUFACTURING A WEB MATERIAL

20190077183

2019-03-14

Watermark sheet, apparatus, and document, and methods for providing the same

20180258588

2018-09-13

Paper including one or more multi-tonal watermarks having full tonality, and an improved watermarking tool for manufacturing such paper

20180251943

2018-09-06

Method and apparatus for manufacturing watermarked paper

20170321377

2017-11-09

DEVICE FOR GENERATING A PATTERN ON A CLOTHING FOR A MACHINE FOR MANUFACTURING A WEB MATERIAL

20170239973

2017-08-24

Watermarking

#10

20150075739

2015-03-19

Electrotype for forming an image during a paper making process

#11

20140178589

2014-06-26

METHOD FOR MAKING SAFETY PAPER WITH CHEMICAL WATERMARK

#12

20130255896

2013-10-03

Device for creating multitone watermarks and methods of manufacture and use thereof

#13

20130092337

2013-04-18

Dewatering screen and method for manufacturing the same

#14

20130049350

2013-02-28

METHOD FOR PROVIDING A WATERMARKING WIRE MESH, WATERMARKING WIRE MESH, APPARATUS FOR OBTAINING IT AND ANTI-COUNTERFEITING DOCUMENT

#15

20120205062

2012-08-16

Sheet material comprising at least one watermark having a colored shade

#16

20110290435

2011-12-01

Method for producing a watermark element, watermark element, and also applications

#17

20110284177

2011-11-24

Security paper, manufacturing method and security document obtained with said paper

#18

20110042025

2011-02-24

Security substrates

#19

20100264642

2010-10-21

SECURITY SHEET COMPRISING A FIBER SUBSTRATE INCLUDING AT LEAST ONE WATERMARK

#20

20100175843

2010-07-15

Dewatering screen and method for the production thereof

#21

20100006248

2010-01-14

Security substrate comprising watermark

#22

20090301676

2009-12-10

Sheet material comprising at least one watermark having a colored shade

#23

20090242153

2009-10-01

PROCESS FOR MANUFACTURING A FIBROUS PLY COMPRISING AN ELEMENT OF A GIVEN THICKNESS AND FORMING FABRIC FOR PRODUCING THE FIBROUS PLY

#24

20090236061

2009-09-24

Method for manufacturing a security paper

#25

20090186205

2009-07-23

MATERIAL IN SHEET FORM HAVING A WINDOW, ITS MANUFACTURING METHOD AND SECURITY DOCUMENT COMPRISING IT

#26

20090001709

2009-01-01

Multi-Ply Security Paper

#27

20080196850

2008-08-21

Decorative tissue sheets

#28

20080185116

2008-08-07

Fabrics for forming decorative tissue sheets

#29

20080107875

2008-05-08

Knitted structure designed to be incorporated in a sheet material

#30

20060157213

2006-07-20

Influencing the profile of the properties of a web by means of at least one acoustic field

#31

20060102302

2006-05-18

Method of forming decorative tissue sheets

#32

20060016557

2006-01-26

Insertion of an elongate element into a fibrous substrate

#33

20050224203

2005-10-13

Security paper and method and apparatus for producing the same

#34

20050173086

2005-08-11

Fibrous sheets

#35

20050016702

2005-01-27

Paper incorporating a wide elongate impermeable element, and a method of making of the same