Inventor
ANGNER RONALD JOSEPH
4 patents
Patents
4 patentsUS4056695ANov 1, 1977
Key telephone line circuit tone-on-hold arrangement
BELL TELEPHONE LABOR INC9 citations68
US4039763AAug 2, 1977
Key telephone communication path interface
BELL TELEPHONE LABOR INC13 citations68
US4057693ANov 8, 1977
Logic control for electronic key telephone line circuit
BELL TELEPHONE LABOR INC6 citations59
US4055731AOct 25, 1977
Key telephone lamp control circuit
BELL TELEPHONE LABOR INC2 citations57