Inventor · disambiguated record
David C. Franson
Also filed as: FRANSON DAVID C · FRANSON DAVID CRAIG
5 granted patents·85 citations·filing 1976–1991
82Inventor score
Files withPARKER HANNIFIN CORP5
Top patents by PatentIndex Score
5 records- 0170US5127661AFluid sealPARKER HANNIFIN CORP·Filed 1991·Granted Jul 7, 1992·38 cites·9 claims
- 0256US4082107AAutomatic drain valve for a compressed air systemPARKER HANNIFIN CORP·Filed 1977·Granted Apr 4, 1978·12 cites·7 claims
- 0353US4640309APilot operated poppet valve with speed controlPARKER HANNIFIN CORP·Filed 1985·Granted Feb 3, 1987·16 cites·3 claims
- 0451US4112968AAutomatic drain valve for a compressed air systemPARKER HANNIFIN CORP·Filed 1977·Granted Sep 12, 1978·10 cites·2 claims
- 0540US4079744ADrain valvePARKER HANNIFIN CORP·Filed 1976·Granted Mar 21, 1978·9 cites·7 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →