Inventor · disambiguated record
David R. Vogelpohl
Also filed as: VOGELPOHL DAVID R
6 granted patents·88 citations·filing 1979–1998
83Inventor score
Files withBELL TELEPHONE LABOR INC2AT & T BELL LAB1AT & T INFORMATION SYSTEMS INC1AT & T TECHNOLOGIES INC1LUCENT TECHNOLOGIES INC1
Top patents by PatentIndex Score
6 records- 0188US4292604ARelaxation oscillator with plural constant current sourcesBELL TELEPHONE LABOR INC·Filed 1979·Granted Sep 29, 1981·36 cites·5 claims
- 0259US4508937AMethod and circuitry for encoding telephone ringing signalsAT & T INFORMATION SYSTEMS INC·Filed 1983·Granted Apr 2, 1985·20 cites·12 claims
- 0354US4276448AElectronic tone ringerBELL TELEPHONE LABOR INC·Filed 1979·Granted Jun 30, 1981·7 cites·18 claims
- 0453US4491691AElectronic tone ringerAT & T BELL LAB·Filed 1983·Granted Jan 1, 1985·11 cites·22 claims
- 0549US4567333AElectronic tone ringer with distinctive signaling circuitryAT & T TECHNOLOGIES INC·Filed 1984·Granted Jan 28, 1986·9 cites·8 claims
- 0630US6064864AAntenna interlock for housing assemblyLUCENT TECHNOLOGIES INC·Filed 1998·Granted May 16, 2000·5 cites·18 claims
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