Donald R. Hartwig

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Rock Island, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Weight transfer linkage arrangement
- Patent number 4,858,698
- Issue date Aug 22, 1989
- Yetter Manufacturing Company
- Gerald E. Williamson
- A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
Information Patent Grant
Single angled blade coulter and fertilizer opener
- Patent number 4,796,550
- Issue date Jan 10, 1989
- Deere & Co.
- Terry L. Van Natta
- A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
Information Patent Grant
Liquid storage and distribution apparatus for agricultural implements
- Patent number 4,244,522
- Issue date Jan 13, 1981
- Deere & Company
- Donald R. Hartwig
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...