Inventor · disambiguated record
Douglas Dean Korthals
Also filed as: KORTHALS DOUGLAS D · KORTHALS DOUGLAS DEAN
8 granted patents·152 citations·filing 2002–2013
88Inventor score
Files withDEERE & CO8
Top patents by PatentIndex Score
8 records- 0195US7458311B2Return to neutral for dual hydrostatic transmissionDEERE & CO·Filed 2006·Granted Dec 2, 2008·32 cites·19 claims
- 0282US6782964B1MowerDEERE & CO·Filed 2002·Granted Aug 31, 2004·39 cites·13 claims
- 0374US9750179B2Convertible mower deck with mulch on demand actuatorDEERE & CO·Filed 2013·Granted Sep 5, 2017·11 cites·9 claims
- 0474US6868657B2Mowing machines with ergonomic hand control leversDEERE & CO·Filed 2002·Granted Mar 22, 2005·26 cites·9 claims
- 0573US7401456B2Horizontally retractable mower deckDEERE & CO·Filed 2005·Granted Jul 22, 2008·12 cites·17 claims
- 0673US6935106B2Neutral start mechanism for a hydrostatic transmissionDEERE & CO·Filed 2003·Granted Aug 30, 2005·24 cites·14 claims
- 0751US6848532B2Transmission control systemsDEERE & CO·Filed 2002·Granted Feb 1, 2005·8 cites·12 claims
- 0844US7430861B2Shift controlled bypass orifice for hydrostatic transmissionDEERE & CO·Filed 2006·Granted Oct 7, 2008·0 cites·16 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →