Inventor · disambiguated record
David M. Embree
Also filed as: EMBREE DAVID M
6 granted patents·90 citations·filing 1983–1989
84Inventor score
Files withAMERICAN TELEPHONE & TELEGRAPH2AT & T BELL LAB2AT & T INFORMATION SYSTEMS INC1AT & T TECHNOLOGIES INC1
Top patents by PatentIndex Score
6 records- 0176US4973922AVoltage controlled variable capacitor and oscillator using itAT & T BELL LAB·Filed 1989·Granted Nov 27, 1990·33 cites·11 claims
- 0259US4508937AMethod and circuitry for encoding telephone ringing signalsAT & T INFORMATION SYSTEMS INC·Filed 1983·Granted Apr 2, 1985·20 cites·12 claims
- 0353US4491691AElectronic tone ringerAT & T BELL LAB·Filed 1983·Granted Jan 1, 1985·11 cites·22 claims
- 0449US4567333AElectronic tone ringer with distinctive signaling circuitryAT & T TECHNOLOGIES INC·Filed 1984·Granted Jan 28, 1986·9 cites·8 claims
- 0547US4853655AHigh frequency CMOS oscillatorAMERICAN TELEPHONE & TELEGRAPH·Filed 1987·Granted Aug 1, 1989·10 cites·9 claims
- 0641US4887053AHigh frequency VLSI oscillatorAMERICAN TELEPHONE & TELEGRAPH·Filed 1988·Granted Dec 12, 1989·7 cites·7 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →