Inventor · disambiguated record
Spencer L. Hermanson
Also filed as: HERMANSON SPENCER L · NILSSEN ALBERT G
8 granted patents·90 citations·filing 1978–2005
86Inventor score
Top patents by PatentIndex Score
8 records- 0173US4219699ATelephone supervision system using DTMF signalsWESCOM·Filed 1978·Granted Aug 26, 1980·14 cites·18 claims
- 0264US4313038ADTMF Signal receiverWESCOM·Filed 1980·Granted Jan 26, 1982·16 cites·3 claims
- 0363USD531613STelephoneTELEDEX CORP·Filed 2005·Granted Nov 7, 2006·16 cites·1 claims
- 0458US6252957B1Low power line selection circuit for a telephoneTELEDEX CORP·Filed 1998·Granted Jun 26, 2001·35 cites·3 claims
- 0553US7251321B2Crescendo telephone ringerTELEDEX LLC·Filed 2003·Granted Jul 31, 2007·3 cites·17 claims
- 0631US5768366AHigh voltage message waiting circuitTELEDEX CORP·Filed 1997·Granted Jun 16, 1998·3 cites·21 claims
- 0728US6567512B1Electronic programmer for telephones with auto-dialTELEDEX CORP·Filed 1999·Granted May 20, 2003·2 cites·23 claims
- 0825US6456713B1Method and apparatus for detecting data port usageTELEDEX LLC·Filed 1998·Granted Sep 24, 2002·1 cites·16 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →