P

Inventor

TANAKA KEIJI

JP151 patents
⚠️ This page may combine multiple inventors who share the name “TANAKA KEIJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

SUMITOMO ELECTRIC INDUSTRIES

15 patents
US6397067B1May 28, 2002

Roadside transmitter

SUMITOMO ELECTRIC INDUSTRIES28 citations92
US7286611B2Oct 23, 2007

Roadway communication system

SUMITOMO ELECTRIC INDUSTRIES15 citations88
US10819425B2Oct 27, 2020

Transimpedance amplifier for receiving burst optical signal

SUMITOMO ELECTRIC INDUSTRIES9 citations84
US8766728B2Jul 1, 2014

Trans-impedance amplifier with enhanced dynamic range but invariable input impedance

SUMITOMO ELECTRIC INDUSTRIES8 citations84
US8358938B2Jan 22, 2013

Optical receiver able to prevent LOS alarm from malfunctioning

SUMITOMO ELECTRIC INDUSTRIES8 citations84
US7912380B2Mar 22, 2011

Optical receiver

SUMITOMO ELECTRIC INDUSTRIES7 citations84
US7843212B2Nov 30, 2010

Differential circuit with precisely controlled terminator circuit

SUMITOMO ELECTRIC INDUSTRIES16 citations84
US7483459B2Jan 27, 2009

Laser driver with selectable output impedance

SUMITOMO ELECTRIC INDUSTRIES8 citations84
US9046703B2Jun 2, 2015

Optical modulator module and semiconductor optical modulator

SUMITOMO ELECTRIC INDUSTRIES9 citations83
US7124592B2Oct 24, 2006

Temperature controlling circuit for a semiconductor light-emitting device

SUMITOMO ELECTRIC INDUSTRIES9 citations74
US12068788B2Aug 20, 2024

Receiver circuit for optical communication

SUMITOMO ELECTRIC INDUSTRIES2 citations73
US11990747B2May 21, 2024

Electrostatic protection circuit and semiconductor integrated circuit

SUMITOMO ELECTRIC INDUSTRIES2 citations73
US11799288B2Oct 24, 2023

Electrostatic protection circuit and semiconductor integrated circuit

SUMITOMO ELECTRIC INDUSTRIES3 citations73
US11601203B2Mar 7, 2023

Transimpedance amplifier for receiving burst optical signal

SUMITOMO ELECTRIC INDUSTRIES3 citations73
US11486760B2Nov 1, 2022

Receiving circuit and optical receiving circuit

SUMITOMO ELECTRIC INDUSTRIES2 citations73

SANYO CHEMICAL IND LTD

5 patents

CANON KK

4 patents

NIPPON TELEGRAPH & TELEPHONE

3 patents

FUJI PHOTO FILM CO LTD

3 patents

KDD CORP

3 patents

SHARP KK

2 patents

KDDI CORP

2 patents

SANKYO CO

1 patent

FUJITSU LTD

1 patent

KDDI SUBMARINE CABLE SYS INC

1 patent

SUMITOMO PHARMA

1 patent

HITACHI LTD

1 patent

SHELL OIL CO

1 patent

SUZUKI MOTOR CO

1 patent

MOTO AKIHIRO

1 patent

PANASONIC COMM CO LTD

1 patent

SATO TADASHI

1 patent

SUN S CO LTD

1 patent

TATSUMI TAIZOU

1 patent

KYOWA HAKKO KOGYO KK

1 patent

Showing the top 50 of 151 patents by PatentIndex Score.