P

Inventor

GOLDTHORP DAVID C

US7 patents
⚠️ This page may combine multiple inventors who share the name “GOLDTHORP DAVID C”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

BELL TELEPHONE LABOR INC

3 patents
US4292604ASep 29, 1981

Relaxation oscillator with plural constant current sources

BELL TELEPHONE LABOR INC36 citations91
US4276448AJun 30, 1981

Electronic tone ringer

BELL TELEPHONE LABOR INC7 citations72
US4224654ASep 23, 1980

Relay driver circuit

BELL TELEPHONE LABOR INC13 citations70

AGERE SYSTEMS INC

1 patent
US6349267B1Feb 19, 2002

Rise and fall time measurement circuit

AGERE SYSTEMS INC15 citations78

AT & T TECHNOLOGIES INC

1 patent
US4567333AJan 28, 1986

Electronic tone ringer with distinctive signaling circuitry

AT & T TECHNOLOGIES INC9 citations70

AT & T BELL LAB

1 patent
US4491691AJan 1, 1985

Electronic tone ringer

AT & T BELL LAB11 citations70

LUCENT TECHNOLOGIES INC

1 patent
US5623230AApr 22, 1997

Low-offset, buffer amplifier

LUCENT TECHNOLOGIES INC3 citations60