Douglas Dean Korthals

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Crestwood, KY, US

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Patents Grantslast 30 patents

Information Patent Grant
Return to neutral for dual hydrostatic transmission
- Patent number 7,458,311
- Issue date Dec 2, 2008
- Deere & Company
- Douglas Dean Korthals
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Shift controlled bypass orifice for hydrostatic transmission
- Patent number 7,430,861
- Issue date Oct 7, 2008
- Deere & Company
- Douglas Dean Korthals
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Neutral start mechanism for a hydrostatic transmission
- Patent number 6,935,106
- Issue date Aug 30, 2005
- Deere & Company
- Douglas Dean Korthals
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Mowing machines with ergonomic hand control levers
- Patent number 6,868,657
- Issue date Mar 22, 2005
- Deere & Company
- Brian E. Bauer
- A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
Information Patent Grant
Transmission control systems
- Patent number 6,848,532
- Issue date Feb 1, 2005
- Deere & Company
- Douglas Dean Korthals
- B62 - LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
Information Patent Grant
Mower
- Patent number 6,782,964
- Issue date Aug 31, 2004
- Deere & Company
- Douglas Dean Korthals
- B62 - LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS

Patents Applicationslast 30 patents

Information Patent Application
Shift controlled bypass orifice for hydrostatic transmission
- Publication number 20080047264
- Publication date Feb 28, 2008
- Deere & Company, a Delaware corporation
- Douglas Dean Korthals
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Application
Return to neutral for dual hydrostatic transmission
- Publication number 20080034958
- Publication date Feb 14, 2008
- Deere & Company, a Delaware corporation
- Douglas Dean Korthals
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Application
Neutral start mechanism for a hydrostatic transmission
- Publication number 20050044850
- Publication date Mar 3, 2005
- Douglas Dean Korthals
- B60 - VEHICLES IN GENERAL
Information Patent Application
Transmission control systems
- Publication number 20030213639
- Publication date Nov 20, 2003
- Deere & Company
- Douglas Dean Korthals
- B62 - LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
Information Patent Application
Mowing machines with ergonomic hand control levers
- Publication number 20030213219
- Publication date Nov 20, 2003
- Brian E. Bauer
- A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING