P

Inventor

YOKOYAMA HIROSHI

JP139 patents
⚠️ This page may combine multiple inventors who share the name “YOKOYAMA HIROSHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

RICOH KK

13 patents
US5915147AJun 22, 1999

Image fixing device, image forming apparatus providing the image fixing device and rotor used in the image fixing device and having induction coil inside

RICOH KK122 citations97
US5832354ANov 3, 1998

Image fixing device, image forming apparatus providing the image fixing device and rotor used in the image fixing device and having induction coil inside

RICOH KK134 citations97
USRE36124EMar 2, 1999

Fixing apparatus

RICOH KK50 citations96
US5300996AApr 5, 1994

Fixing apparatus

RICOH KK94 citations96
US4926358AMay 15, 1990

System for controlling curls of a paper

RICOH KK72 citations94
US6530028B1Mar 4, 2003

Image forming apparatus having an efficient localization system, and a method thereof

RICOH KK21 citations93
US6340810B2Jan 22, 2002

Device with induction heating roller including projecting portions at both ends and a central portion of a bobbin for maintaining a gap between an inner surface of the heating roller and a coil on the bobbin

RICOH KK43 citations93
US6255632B1Jul 3, 2001

Device with induction heating roller with a projection between coil windings

RICOH KK41 citations93
US5424844AJun 13, 1995

Copy machine managing system and facsimile machine used therein

RICOH KK62 citations92
US7003251B2Feb 21, 2006

Image forming method having transfer temperature difference and apparatus for the same

RICOH KK12 citations84
US6983117B2Jan 3, 2006

Image forming apparatus configured for double sided printing

RICOH KK12 citations84
US6763211B2Jul 13, 2004

Vertical path sheet jam recovery image forming apparatus

RICOH KK16 citations84
US5802261ASep 1, 1998

Facsimile apparatus improved printer, scanner and communication functions

RICOH KK7 citations74

HITACHI LTD

6 patents

SONY CORP

5 patents

TOSHIBA MACHINE CO LTD

4 patents

KONICA MINOLTA HOLDINGS INC

2 patents

NHK SPRING CO LTD

2 patents

UNITIKA LTD

2 patents

NEC CORP

2 patents

TOSHIBA TEC KK

1 patent

RICOH CO LTD

1 patent

AGENCY IND SCIENCE TECHN

1 patent

ASAHI CHEMICAL IND

1 patent

SANDOZ LTD

1 patent

JAPAN SCIENCE & TECH AGENCY

1 patent

KOWA INC

1 patent

SIJTECHNOLOGY INC

1 patent

ASAHI KASEI CHEMICALS CORP

1 patent

NANOSYSTEM SOLUTIONS INC

1 patent

MITSUBOSHI BELTING LTD

1 patent

SUZUKI MOTOR CO

1 patent

SEIKO INSTR INC

1 patent

NISSAN MOTOR

1 patent

Showing the top 50 of 139 patents by PatentIndex Score.