Inventor

HIRATO AKIRA

JP3 patents

Patents

3 patents

US4583214AApr 15, 1986

Key telephone transmission system

IWATSU ELECTRIC CO LTD51 citations91

US4380690AApr 19, 1983

Hybrid circuit

IWATSU ELECTRIC CO LTD15 citations71

US5228035AJul 13, 1993

Synchronizing system in digital communication line

IWATSU ELECTRIC CO LTD17 citations70