Inventor · disambiguated record
Rolf E. Rothfjell
Also filed as: ROTHFJELL ROLF E · ROTHFJELL ROLF ERIC
4 granted patents·321 citations·filing 1975–1984
80Inventor score
Top patents by PatentIndex Score
4 records- 0194US4590366AMethod of securing simple codesESSELTE SECURITY SYST AB·Filed 1984·Granted May 20, 1986·254 cites·6 claims
- 0275US4055833AMethod of deriving characteristic contours from a colored pictureROTHFJELL ROLF ERIC·Filed 1975·Granted Oct 25, 1977·12 cites·5 claims
- 0367US4581482AMethod and device for signature verificationESSELTE SECURITY SYST AB·Filed 1984·Granted Apr 8, 1986·53 cites·12 claims
- 0423US4464448AMethod of producing an identity documentROLLFILM AB·Filed 1983·Granted Aug 7, 1984·2 cites·5 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →