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 patentsUS5915147AJun 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 patentsUS5333240AJul 26, 1994
Neural network state diagnostic system for equipment
HITACHI LTD234 citations99
US5305230AApr 19, 1994
Process control system and power plant process control system
HITACHI LTD196 citations98
US5095359AMar 10, 1992
Semiconductor package and computer using the package
HITACHI LTD29 citations92
US5028989AJul 2, 1991
Semiconductor cooling module
HITACHI LTD42 citations92
US6498314B2Dec 24, 2002
Vacuum switch and vacuum switchgear using the same
HITACHI LTD24 citations88
US4523927AJun 18, 1985
Method of coal upgrading
HITACHI LTD20 citations81
SONY CORP
5 patentsUS5092458AMar 3, 1992
Waterproof case for camera
SONY CORP146 citations99
US5757921AMay 26, 1998
Radio communication apparatus having common oscillator applied for PLL, conversion and scramble/descramble circuits
SONY CORP36 citations92
US5752169AMay 12, 1998
Integrated circuit and transmitter/receiver
SONY CORP31 citations92
US5305030AApr 19, 1994
Combination of water-proof camera case and detachable hand grip assembly
SONY CORP44 citations90
US5712595AJan 27, 1998
Apparatus and method of setting variable dividing ratio and apparatus using the same
SONY CORP15 citations74
TOSHIBA MACHINE CO LTD
4 patentsUS5859777AJan 12, 1999
Casting control support system for die casting machines
TOSHIBA MACHINE CO LTD74 citations94
US5870305AFeb 9, 1999
Control method for die cast machine
TOSHIBA MACHINE CO LTD17 citations84
US5770808AJun 23, 1998
Product quality determining methods for die cast machines
TOSHIBA MACHINE CO LTD17 citations84
US6679698B2Jan 20, 2004
Die clamping apparatus
TOSHIBA MACHINE CO LTD10 citations74
KONICA MINOLTA HOLDINGS INC
2 patentsUS7449283B2Nov 11, 2008
Producing method of electrostatic sucking type liquid jetting head, producing method of nozzle plate, driving method of electrostatic sucking type liquid jetting head, electrostatic sucking type liquid jetting apparatus and liquid jetting apparatus
KONICA MINOLTA HOLDINGS INC13 citations84
US7314185B2Jan 1, 2008
Liquid jetting device
KONICA MINOLTA HOLDINGS INC17 citations84
NHK SPRING CO LTD
2 patentsUNITIKA LTD
2 patentsNEC CORP
2 patentsTOSHIBA TEC KK
1 patentRICOH CO LTD
1 patentAGENCY IND SCIENCE TECHN
1 patentASAHI CHEMICAL IND
1 patentSANDOZ LTD
1 patentJAPAN SCIENCE & TECH AGENCY
1 patentKOWA INC
1 patentSIJTECHNOLOGY INC
1 patentASAHI KASEI CHEMICALS CORP
1 patentNANOSYSTEM SOLUTIONS INC
1 patentMITSUBOSHI BELTING LTD
1 patentSUZUKI MOTOR CO
1 patentSEIKO INSTR INC
1 patentNISSAN MOTOR
1 patentShowing the top 50 of 139 patents by PatentIndex Score.