Inventor

OHTAWA SHUJI

JP3 patents

Patents

3 patents

US4785435ANov 15, 1988

Self-chargeable electronic timepiece with operating voltage checking

SEIKO INSTR INC31 citations91

US4750099AJun 7, 1988

Circuit for charging capacitors

SEIKO INSTR INC10 citations71

US4737944AApr 12, 1988

Electronic timepiece

SEIKO INSTR INC6 citations62