Inventor

TOHJI SHIGEO

JP3 patents

Patents

3 patents

US4868592ASep 19, 1989

Automatic focusing device

ASAHI OPTICAL CO LTD19 citations79

US4952962AAug 28, 1990

Automatic focusing device

ASAHI OPTICAL CO LTD11 citations71

US4905034AFeb 27, 1990

Automatic focusing projector

ASAHI OPTICAL CO LTD10 citations69