Inventor · disambiguated record
Donald R. Hughes
Also filed as: GUMMA WILLIAM H · HUGHES DONALD R
22 granted patents·1 pending application·303 citations·filing 1976–2019
96Inventor score
Files withHUGHES DONALD R12GREENLEAF TECH CORPORATION3BEECHIE BRIAN E1GREENLEAF TECH CORP1GREENLEAF TECHNOLOGY CORP1
Top patents by PatentIndex Score
23 records- 0185USD290581STubular keyHUGHES DONALD R·Filed 1985·Granted Jun 30, 1987·24 cites·1 claims
- 0283US9834891B2Rail re-profiling method and apparatusGREENLEAF TECH CORPORATION·Filed 2017·Granted Dec 5, 2017·3 cites·41 claims
- 0383US4102166AKey bow coverHUGHES DONALD R·Filed 1977·Granted Jul 25, 1978·34 cites·5 claims
- 0479US6712564B1Tool with improved resistance to displacementGREENLEAF TECHNOLOGY CORP·Filed 2000·Granted Mar 30, 2004·34 cites·57 claims
- 0577US8267625B2Slotting cutter and inserts for sameHUGHES DONALD R·Filed 2008·Granted Sep 18, 2012·10 cites·24 claims
- 0676US6173595B1Lock picking apparatusFiled 2000·Granted Jan 16, 2001·25 cites·3 claims
- 0771US8177459B2Ball nose end mill and insertHUGHES DONALD R·Filed 2008·Granted May 15, 2012·9 cites·56 claims
- 0871US5956984ALock picking apparatusFiled 1997·Granted Sep 28, 1999·26 cites·6 claims
- 0968US4045983AUniversal barrel key apparatusHUGHES DONALD R·Filed 1976·Granted Sep 6, 1977·20 cites·8 claims
- 1067US9617691B2Rail re-profiling method and apparatusGREENLEAF TECH CORP·Filed 2013·Granted Apr 11, 2017·3 cites·21 claims
- 1164US8095287B2Methods and systems for controlling an axle disconnect device for an all-wheel drive vehicleBEECHIE BRIAN E·Filed 2007·Granted Jan 10, 2012·7 cites·11 claims
- 1263US9073131B2Slotting cutter and inserts for sameHUGHES DONALD R·Filed 2012·Granted Jul 7, 2015·2 cites·20 claims
- 1357US6138486ALock picking apparatusFiled 1999·Granted Oct 31, 2000·15 cites·4 claims
- 1454US9827621B2Cutting tool including a cutting insert retaining and adjusting mechanismHUGHES DONALD R·Filed 2009·Granted Nov 28, 2017·3 cites·15 claims
- 1554US4683739AKey operated lockHUGHES DONALD R·Filed 1986·Granted Aug 4, 1987·19 cites·12 claims
- 1652US10352001B2Rail re-profiling method and apparatusGREENLEAF TECH CORPORATION·Filed 2014·Granted Jul 16, 2019·0 cites·23 claims
- 1751US2020087865A1Rail re-profiling method and apparatusGREENLEAF TECH CORPORATION·Filed 2019·Application pending·0 cites
- 1850US4217571AStutter seismic sourceSTANDARD OIL CO INDIANA·Filed 1978·Granted Aug 12, 1980·12 cites·20 claims
- 1949US4831852AKey operated lockHUGHES DONALD R·Filed 1988·Granted May 23, 1989·16 cites·8 claims
- 2049US4094176APick for tubular cylinder locksHUGHES DONALD R·Filed 1977·Granted Jun 13, 1978·11 cites·11 claims
- 2147US6041629ALock picking apparatusFiled 1999·Granted Mar 28, 2000·10 cites·11 claims
- 2247US4324513ATubular key manufacturing machineHUGHES DONALD R·Filed 1980·Granted Apr 13, 1982·10 cites·3 claims
- 2346US4622834AKey assemblyHUGHES DONALD R·Filed 1985·Granted Nov 18, 1986·10 cites·4 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →