Inventor

TO CHUN YUEN

HK75 patents

⚠️ This page may combine multiple inventors who share the name “TO CHUN YUEN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

WORLD WIDE STATIONERY MFG CO

36 patents

US6758621B2Jul 6, 2004

Ring binder mechanism

WORLD WIDE STATIONERY MFG CO76 citations98

US6467984B1Oct 22, 2002

Ring binder having actuating lever with cushion member

WORLD WIDE STATIONERY MFG CO84 citations98

US6364558B1Apr 2, 2002

Ring binder having actuating lever with cushion member

WORLD WIDE STATIONERY MFG CO103 citations98

US6474897B1Nov 5, 2002

Ring binder having actuating lever with cushion member

WORLD WIDE STATIONERY MFG CO72 citations96

US5842807ADec 1, 1998

Ring binder

WORLD WIDE STATIONERY MFG CO47 citations96

US5755513AMay 26, 1998

Ring binder

WORLD WIDE STATIONERY MFG CO38 citations96

US7360962B2Apr 22, 2008

Ring binder mechanism

WORLD WIDE STATIONERY MFG CO24 citations93

USRE38731EMay 3, 2005

Ring binder

WORLD WIDE STATIONERY MFG CO14 citations93

US6328497B1Dec 11, 2001

Ring mechanism for a binder having a plastic top section

WORLD WIDE STATIONERY MFG CO38 citations93

US6168339B1Jan 2, 2001

Ring binder

WORLD WIDE STATIONERY MFG CO24 citations93

US5971649AOct 26, 1999

Ring binder mechanism

WORLD WIDE STATIONERY MFG CO36 citations93

USD466153SNov 26, 2002

Ring binder mechanism fastener

WORLD WIDE STATIONERY MFG CO15 citations92

USD461498SAug 13, 2002

Ring binder mechanism fastener

WORLD WIDE STATIONERY MFG CO14 citations92

US6007266ADec 28, 1999

Fastener for a ring binder and method of producing a binder assembly

WORLD WIDE STATIONERY MFG CO21 citations92

US5924811AJul 20, 1999

Assembling and disassembling device for ring binders

WORLD WIDE STATIONERY MFG CO87 citations92

US7726897B2Jun 1, 2010

Ring binder mechanism

WORLD WIDE STATIONERY MFG CO25 citations86

USD616023SMay 18, 2010

Push button ring mechanism having rectilinear binder rings

WORLD WIDE STATIONERY MFG CO8 citations84

US7637682B2Dec 29, 2009

Ring binder

WORLD WIDE STATIONERY MFG CO8 citations84

USD585935SFeb 3, 2009

Rectilinear binder ring

WORLD WIDE STATIONERY MFG CO9 citations84

USD582477SDec 9, 2008

Binding ring

WORLD WIDE STATIONERY MFG CO13 citations84

US6536980B2Mar 25, 2003

Ring binder having actuating lever with cushion member

WORLD WIDE STATIONERY MFG CO19 citations84

US5846013ADec 8, 1998

Ring binder

WORLD WIDE STATIONERY MFG CO17 citations84

USD622316SAug 24, 2010

Dual lever ring mechanism with rectilinear binder rings

WORLD WIDE STATIONERY MFG CO5 citations74

USD616934SJun 1, 2010

Single lever ring mechanism having rectilinear binder rings

WORLD WIDE STATIONERY MFG CO5 citations74

USD598494SAug 18, 2009

Binding ring

WORLD WIDE STATIONERY MFG CO7 citations74

USD473897SApr 29, 2003

Ring binder housing cover

WORLD WIDE STATIONERY MFG CO8 citations74

USD460109SJul 9, 2002

Housing for a ring binder mechanism

WORLD WIDE STATIONERY MFG CO9 citations74

USD457559SMay 21, 2002

Ring binder

WORLD WIDE STATIONERY MFG CO12 citations74

US7819602B2Oct 26, 2010

Ring binder mechanism

WORLD WIDE STATIONERY MFG CO6 citations70

US8047737B2Nov 1, 2011

Ring binder mechanism

WORLD WIDE STATIONERY MFG CO6 citations69

USD735808SAug 4, 2015

Elliptical cross sectional ring member for a ring mechanism

WORLD WIDE STATIONERY MFG CO2 citations63

USRE41852EOct 26, 2010

Rectilinear binder ring

WORLD WIDE STATIONERY MFG CO2 citations63

USD468351SJan 7, 2003

Ring binder housing cover

WORLD WIDE STATIONERY MFG CO5 citations63

USD461497SAug 13, 2002

Ring binder housing cover

WORLD WIDE STATIONERY MFG CO3 citations63

USD453026SJan 22, 2002

Ring binder

WORLD WIDE STATIONERY MFG CO4 citations63

USD442223SMay 15, 2001

Corrugated ring binder housing

WORLD WIDE STATIONERY MFG CO3 citations63

WORLD WIDE DAILY HOLDINGS CO LTD

7 patents

USD943284SFeb 15, 2022

Toothbrush head

WORLD WIDE DAILY HOLDINGS CO LTD2 citations73

USD943285SFeb 15, 2022

Toothbrush head

WORLD WIDE DAILY HOLDINGS CO LTD4 citations73

USD927191SAug 10, 2021

Toothbrush

WORLD WIDE DAILY HOLDINGS CO LTD3 citations73

US10932557B2Mar 2, 2021

Dental cleaning tool with handle shield

WORLD WIDE DAILY HOLDINGS CO LTD4 citations73

USD906687SJan 5, 2021

Toothbrush

WORLD WIDE DAILY HOLDINGS CO LTD2 citations73

USD897687SOct 6, 2020

Toothbrush

WORLD WIDE DAILY HOLDINGS CO LTD4 citations73

USD878766SMar 24, 2020

Toothbrush

WORLD WIDE DAILY HOLDINGS CO LTD4 citations73

WORLD WIDE STATIONARY MFG CO L

3 patents

US6533486B1Mar 18, 2003

Ring binder having actuating lever with cushion member

WORLD WIDE STATIONARY MFG CO L75 citations98

US6033144AMar 7, 2000

Ring binder mechanism

WORLD WIDE STATIONARY MFG CO L34 citations92

US6280114B1Aug 28, 2001

Ring binder having actuating lever with cushion member

WORLD WIDE STATIONARY MFG CO L16 citations84

WORLD WIDE STATIONERY MFG CO LTD

3 patents

USD433445SNov 7, 2000

Ring binder

WORLD WIDE STATIONERY MFG CO LTD20 citations92

USD426571SJun 13, 2000

Ring binder

WORLD WIDE STATIONERY MFG CO LTD13 citations74

US9656507B2May 23, 2017

Ring binder mechanism having snap-in ring members

WORLD WIDE STATIONERY MFG CO LTD1 citations63

WORLD WIDE STATIONERY MFG COMPANY LIMITED

1 patent

USD382593SAug 19, 1997

Ring binder

WORLD WIDE STATIONERY MFG COMPANY LIMITED24 citations89

Showing the top 50 of 75 patents by PatentIndex Score.