Inventor · disambiguated record
Louis W. Champan
Also filed as: CHAMPAN LOUIS W
6 granted patents·80 citations·filing 1974–1976
83Inventor score
Top patents by PatentIndex Score
6 records- 0187US3976849ATelephone wiring testerMELCO·Filed 1975·Granted Aug 24, 1976·41 cites·8 claims
- 0269US4066846ACombined rotary dial and touch-tone telephone decoding systemMELCO·Filed 1976·Granted Jan 3, 1978·12 cites·18 claims
- 0360US3944753AApparatus for distinguishing voice and other noise signals from legitimate multi-frequency tone signals present on telephone or similar communication linesPROCTOR & ASSOC CO·Filed 1974·Granted Mar 16, 1976·13 cites·12 claims
- 0450US4009354ASignalling device for key telephone systemsMELCO·Filed 1975·Granted Feb 22, 1977·5 cites·15 claims
- 0545US4044206ADigital decoder for multiple frequency telephone signallingMELCO·Filed 1976·Granted Aug 23, 1977·4 cites·16 claims
- 0645US3997734ATelephone hold attachmentMELCO·Filed 1975·Granted Dec 14, 1976·5 cites·7 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →