Inventor
NAGAYAMA KEIJI
12 patents
⚠️ This page may combine multiple inventors who share the name “NAGAYAMA KEIJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
7 patentsUS6226449B1May 1, 2001
Apparatus for recording and reproducing digital image and speech
HITACHI LTD124 citations98
US6876612B2Apr 5, 2005
Information recording apparatus and method
HITACHI LTD38 citations92
US6445654B1Sep 3, 2002
Recording/reproducing method and device with supplementary data storage and output
HITACHI LTD25 citations91
US7106954B2Sep 12, 2006
Digital camcorder
HITACHI LTD10 citations73
US7193946B2Mar 20, 2007
Information recording apparatus and method
HITACHI LTD0 citations51
US8009536B2Aug 30, 2011
Recording and reproducing apparatus
HITACHI LTD0 citations41
US7885515B2Feb 8, 2011
Recording/reproducing device and recording/reproduction method
HITACHI LTD0 citations34