Inventor
OJIMA HISAMI
JP3 patents
Patents
3 patentsUS4823377AApr 18, 1989
System for setting registration mode for key telephone set
TAMURA ELECTRIC WORKS LTD9 citations70
US4794641ADec 27, 1988
Data transmission system of key telephone system
TAMURA ELECTRIC WORKS LTD1 citations47
US4731820AMar 15, 1988
Data transmission system of key telephone system
TAMURA ELECTRIC WORKS LTD1 citations47