P

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 patents
US5574289ANov 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

OCHI ATSUKO

3 patents

SUMITOMO ELECTRIC INDUSTRIES

2 patents

SUMITOMO RUBBER IND

2 patents

RICOH CO LTD

2 patents

HONDA MOTOR CO LTD

1 patent

FURUKAWA ALUMINIUM

1 patent

KANEKA CORP

1 patent

NIWA KAZUKI

1 patent

TAKAI ATSUSHI

1 patent

TAKASHIMA SHIGEHIRO

1 patent