HS

Hirofumi Sugiura

OE Otis Elevator: 2 patents #650 of 1,840Top 40%
📍 Ebeye: #1,994 of 4,528 inventorsTop 45%
Overall (All Time): #2,304,475 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5247140 Brake control system in elevator control apparatus Masao Iwasa, Koji Yamada 1993-09-21
5105352 Offset correction circuit of PWM inverter Masao Iwasa 1992-04-14