Inventor · disambiguated record
Richard F. Challen
Also filed as: CHALLEN RICHARD F
5 granted patents·1 pending application·105 citations·filing 1976–2006
81Inventor score
Top patents by PatentIndex Score
6 records- 0184US4521918ABattery saving frequency synthesizer arrangementGEN ELECTRIC·Filed 1980·Granted Jun 4, 1985·48 cites·4 claims
- 0282US4158180ATemperature control circuitGEN ELECTRIC·Filed 1978·Granted Jun 12, 1979·40 cites·9 claims
- 0347US4047009ADigital tone generator for use with radio transmitters and the likeGEN ELECTRIC·Filed 1976·Granted Sep 6, 1977·8 cites·6 claims
- 0441US2007038939A1Display servers and systems and methods of graphical displayCHALLEN RICHARD F·Filed 2006·Application pending·0 cites
- 0540US4171516ATone phase shift detectorGEN ELECTRIC·Filed 1977·Granted Oct 16, 1979·5 cites·11 claims
- 0632US4351032AFrequency sensing circuitGEN ELECTRIC·Filed 1980·Granted Sep 21, 1982·4 cites·49 claims
Join the waitlist — get patent alerts
Get an alert when Richard F. Challen files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →