Inventor

ASHIKAWA YOSHIHISA

JP8 patents

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

RICOH KK

3 patents

US6829444B2Dec 7, 2004

Image forming apparatus, charging unit, and method of controlling of voltage applied to charging unit

RICOH KK16 citations81

US7659726B2Feb 9, 2010

Image forming apparatus with plural AC sources

RICOH KK6 citations60

US7574152B2Aug 11, 2009

AC high-voltage device, image forming apparatus, and AC high-voltage output controlling method which restarts the AC high-voltage after an overload

RICOH KK3 citations60

RICOH CO LTD

2 patents

US7853164B2Dec 14, 2010

Image forming apparatus and power control method

RICOH CO LTD5 citations60

US8368251B2Feb 5, 2013

Image forming apparatus, image forming method in image forming apparatus, and computer program product

RICOH CO LTD0 citations39

ASHIKAWA YOSHIHISA

2 patents

US8081894B2Dec 20, 2011

Image forming apparatus and method of controlling heating of fixing unit therein

ASHIKAWA YOSHIHISA4 citations54

US8781358B2Jul 15, 2014

Image forming apparatus, image forming method, computer program product, and image forming system

ASHIKAWA YOSHIHISA0 citations35

ISHII TATSUYA

1 patent

US8743384B2Jun 3, 2014

Image forming apparatus and communication control program product

ISHII TATSUYA5 citations71