Inventor

MAZAWA HEISAKU

JP2 patents

Patents

2 patents

US6504485B2Jan 7, 2003

Monitoring apparatus and control apparatus for traffic signal lights

NIPPON SIGNAL CO LTD17 citations81

US6184799B1Feb 6, 2001

Monitoring apparatus and control apparatus for traffic signal lights

NIPPON SIGNAL CO LTD5 citations59