Inventor · disambiguated record
Donald L. Hopkins
Also filed as: HOPKINS DONALD L
11 granted patents·222 citations·filing 1975–2017
91Inventor score
Top patents by PatentIndex Score
11 records- 0193US4030623AHydraulic circuitry for an excavatorCATERPILLAR TRACTOR CO·Filed 1976·Granted Jun 21, 1977·46 cites·17 claims
- 0290US4174762AHydrostatic transmission with differential steeringCATERPILLAR TRACTOR CO·Filed 1978·Granted Nov 20, 1979·44 cites·8 claims
- 0386US4028010AReversible, variable-displacement piston pump with positioner means for automatic return to zero displacementCATERPILLAR TRACTOR CO·Filed 1975·Granted Jun 7, 1977·46 cites·7 claims
- 0470US4275685AApparatus for the handling of sheepHANNAFORD ALF & CO LTD·Filed 1980·Granted Jun 30, 1981·24 cites·6 claims
- 0561US10130098B1Use of Xylella fastidiosa strain EB92-1 to generate tolerance to HLB disease in citrusUNIV FLORIDA·Filed 2017·Granted Nov 20, 2018·0 cites·16 claims
- 0655US3986701ASpade-like detent for hydraulic control valveCATERPILLAR TRACTOR CO·Filed 1975·Granted Oct 19, 1976·15 cites·5 claims
- 0754US4028890APiston pump assembly utilizing load pressure controlCATERPILLAR TRACTOR CO·Filed 1976·Granted Jun 14, 1977·11 cites·6 claims
- 0847US4119169APump drive for hydrostatic machines with external gearsCATERPILLAR TRACTOR CO·Filed 1977·Granted Oct 10, 1978·10 cites·10 claims
- 0946US4312300ASheep handling apparatus and methods of handling sheepHANNAFORD ALF & CO LTD·Filed 1980·Granted Jan 26, 1982·12 cites·7 claims
- 1040US4292931AMethod and means for holding a sheepHANNAFORD ALF & CO LTD·Filed 1980·Granted Oct 6, 1981·8 cites·6 claims
- 1135US4265199AMethod and apparatus to assist in provoking forward movement of animalsHANNAFORD ALF & CO LTD·Filed 1979·Granted May 5, 1981·6 cites·9 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →