Inventor
TAKAI ATSUSHI
38 patents
⚠️ This page may combine multiple inventors who share the name “TAKAI ATSUSHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
23 patentsUS5574289ANov 12, 1996
Semiconductor optical integrated device and light receiver using said device
HITACHI LTD60 citations96
US5567961AOct 22, 1996
Semiconductor device
HITACHI LTD62 citations96
US5510921AApr 23, 1996
Optical frequency division multiplexing network
HITACHI LTD72 citations96
US5448661ASep 5, 1995
Optical parallel transmission device
HITACHI LTD59 citations96
US5263108ANov 16, 1993
Electrical circuit apparatus
HITACHI LTD108 citations96
US5715339AFeb 3, 1998
Optical parallel transmission device
HITACHI LTD25 citations92
US5675599AOct 7, 1997
Driving circuit of laser diode and optical transmission device
HITACHI LTD19 citations92
US5548399AAug 20, 1996
Method and apparatus for testing a DC coupled optical receiver
HITACHI LTD31 citations92
US5363393ANov 8, 1994
Surface emitting semiconductor laser
HITACHI LTD28 citations92
US5321540AJun 14, 1994
Optical frequency division multiplexing network
HITACHI LTD20 citations92
US4880289ANov 14, 1989
Two-way optical transmission system
HITACHI LTD50 citations92
US4759015AJul 19, 1988
Ring network system for transmission of multicast information
HITACHI LTD33 citations91
US5675685AOct 7, 1997
Optical semiconductor array module, method of fabricating the module, and external board mounting structure of the module
HITACHI LTD46 citations89
US6619865B1Sep 16, 2003
Optical frequency division multiplexing network
HITACHI LTD11 citations82
US5568576AOct 22, 1996
Optical parallel transmission device
HITACHI LTD18 citations82
US5801864ASep 1, 1998
Optical frequency division multiplexing network
HITACHI LTD9 citations74
US5293084AMar 8, 1994
High speed logic circuit
HITACHI LTD12 citations74
US5263109ANov 16, 1993
Optical transmission paths and methods of measuring their optical transmission times
HITACHI LTD9 citations74
US5130677AJul 14, 1992
Signal termination circuit
HITACHI LTD8 citations74
US4270220AMay 26, 1981
Electronic tuning type television receiver
HITACHI LTD7 citations73
US4308596ADec 29, 1981
Memory driving method
HITACHI LTD4 citations63
US7127170B2Oct 24, 2006
Optical frequency division multiplexing network
HITACHI LTD0 citations52
US5870418AFeb 9, 1999
Driving circuit of laser diode and optical transmission device
HITACHI LTD0 citations52