Inventor

IWAI YOSHIYUKI

JP3 patents

Patents

3 patents

US4576515AMar 18, 1986

Pipe laying apparatus

NIPPON TELEGRAPH & TELEPHONE37 citations90

US4571122AFeb 18, 1986

Pipe laying apparatus

NIPPON TELEGRAPH & TELEPHONE11 citations71

US4653594AMar 31, 1987

Vibration generating apparatus

NIPPON TELEGRAPH & TELEPHONE4 citations60