Inventor · disambiguated record
Frank W. Betlejewski
Also filed as: BETLEJEWSKI FRANK W
3 granted patents·43 citations·filing 1974–1978
65Inventor score
Files withBELL & HOWELL CO3
Top patents by PatentIndex Score
3 records- 0173US4157763ARotatable carrying handle arrangementBELL & HOWELL CO·Filed 1977·Granted Jun 12, 1979·40 cites·12 claims
- 0243US3982117AElectronic flash unit for camerasBELL & HOWELL CO·Filed 1974·Granted Sep 21, 1976·3 cites·14 claims
- 0328US4174158ABowed slide handling apparatusBELL & HOWELL CO·Filed 1978·Granted Nov 13, 1979·0 cites·5 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →