Inventor · disambiguated record
John F. Duvall
Also filed as: DUVALL JOHN · DUVALL JOHN F · DUVALL JOHN FARRELL
7 granted patents·237 citations·filing 1982–2001
88Inventor score
Files withCHECKERS IND PRODUCTS INC2DUVALL JOHN F1EASTMAN KODAK CO1WILFLEY & SONS INC A1WILLIAMETTE VALLEY COMPANY1
Top patents by PatentIndex Score
7 records- 0193US6481036B1Modular cable protector having removable wheel chair rampsCHECKERS IND PRODUCTS INC·Filed 2001·Granted Nov 19, 2002·92 cites·21 claims
- 0272US5962809AApparatus and method for protecting underground cablesWILLIAMETTE VALLEY COMPANY·Filed 1997·Granted Oct 5, 1999·43 cites·45 claims
- 0370US4793925AHydrocyclone constructionWILFLEY & SONS INC A·Filed 1986·Granted Dec 27, 1988·35 cites·14 claims
- 0468US6109399ABrake shoe and production method thereforFiled 1997·Granted Aug 29, 2000·23 cites·34 claims
- 0562USD448338SHand grip for a wheel chockCHECKERS IND PRODUCTS INC·Filed 2000·Granted Sep 25, 2001·14 cites·1 claims
- 0659US4409389APreparation of imidazolesEASTMAN KODAK CO·Filed 1982·Granted Oct 11, 1983·4 cites·5 claims
- 0738US4999856AFacemask protection deviceDUVALL JOHN F·Filed 1990·Granted Mar 19, 1991·26 cites·10 claims
Join the waitlist — get patent alerts
Get an alert when John F. Duvall files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →