Inventor

NAGAI TOHRU

JP4 patents

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

HITACHI LTD

2 patents

US5646853AJul 8, 1997

Traffic control system

HITACHI LTD161 citations97

US5703778ADec 30, 1997

Traffic control method for relieving vehicle congestion on parallel roads

HITACHI LTD15 citations70

SONY CORP

2 patents

US5993971ANov 30, 1999

Optical information record medium

SONY CORP2 citations60

US8027090B2Sep 27, 2011

Optical element, replica substrate configured to form optical element

SONY CORP0 citations51