Inventor
OHKAWA TAKEHIRO
JP6 patents
⚠️ This page may combine multiple inventors who share the name “OHKAWA TAKEHIRO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
5 patentsUS5999409ADec 7, 1999
Contactless IC card
HITACHI LTD57 citations95
US6373708B1Apr 16, 2002
Contactless IC card
HITACHI LTD24 citations92
US5594680AJan 14, 1997
Noise reduced contactless parallel data transfer device and method thereof
HITACHI LTD24 citations89
US7212124B2May 1, 2007
Portable information device
HITACHI LTD14 citations82
US6121623ASep 19, 2000
Parallel radiation detector
HITACHI LTD3 citations61