Inventor · disambiguated record
Douglas A. Johns
Also filed as: JOHNS DOUGLAS A
5 granted patents·389 citations·filing 1975–1994
85Inventor score
Top patents by PatentIndex Score
5 records- 0190US5576941AModular power supply systemYORK TECHNOLOGIES INC·Filed 1994·Granted Nov 19, 1996·279 cites·25 claims
- 0278US5055747ASelf-regulating, no load protected electronic ballast systemINTENT PATENT AG·Filed 1990·Granted Oct 8, 1991·47 cites·20 claims
- 0372US3979953AMass flow meter for cryogenic fluidSCIENT INSTR INC·Filed 1975·Granted Sep 14, 1976·27 cites·4 claims
- 0463US4005603AApparatus for measuring fluid flowAIRCO INC·Filed 1975·Granted Feb 1, 1977·21 cites·3 claims
- 0551US5130611AUniversal electronic ballast systemINTENT PATENT AG·Filed 1991·Granted Jul 14, 1992·15 cites·20 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →