Inventor · disambiguated record
David C. Planchard
Also filed as: PLANCHARD DAVID · PLANCHARD DAVID C
5 granted patents·267 citations·filing 1985–1996
82Inventor score
Top patents by PatentIndex Score
5 records- 0195US5868159APressure-based mass flow controllerMKS INSTR INC·Filed 1996·Granted Feb 9, 1999·228 cites·15 claims
- 0256US4655046ACryopump with exhaust filterHELIX TECH CORP·Filed 1985·Granted Apr 7, 1987·16 cites·10 claims
- 0335US4932428ABypass relief poppet valveHELIX TECH CORP·Filed 1988·Granted Jun 12, 1990·8 cites·10 claims
- 0435US4906266AReplacement method and apparatus for a cryogenic refrigeration unitHELIX TECH CORP·Filed 1988·Granted Mar 6, 1990·7 cites·24 claims
- 0532US4956974AReplacement method and apparatus for a cryogenic refrigeration unitHELIX TECH CORP·Filed 1990·Granted Sep 18, 1990·8 cites·10 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →