Inventor · disambiguated record
Frederick D. Helversen
Also filed as: HELVERSEN FREDERICK D
5 granted patents·193 citations·filing 1974–1986
84Inventor score
Top patents by PatentIndex Score
5 records- 0187US4074441ARotary through dryer having multiple vacuum chambers and associated heatersHELVERSEN FREDERICK D·Filed 1976·Granted Feb 21, 1978·60 cites·13 claims
- 0287US3985572AAutomatic spray cleaning apparatus and methodGEORGIA PACIFIC CORP·Filed 1974·Granted Oct 12, 1976·54 cites·34 claims
- 0384US4249654AHydrogen storage apparatusHELVERSEN FREDERICK D·Filed 1979·Granted Feb 10, 1981·48 cites·12 claims
- 0469US3994365AApparatus for positioning person within container tankGEORGIA PACIFIC CORP·Filed 1975·Granted Nov 30, 1976·20 cites·15 claims
- 0543US4678368ACanal covering system and method of installing sameHELVERSEN FREDERICK D·Filed 1986·Granted Jul 7, 1987·11 cites·10 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →