Inventor · disambiguated record
Harlin J. Trefz
Also filed as: TREFZ HARLIN · TREFZ HARLIN J · TREFZ HARLIN JAMES
20 granted patents·1 pending application·439 citations·filing 1974–2014
96Inventor score
Top patents by PatentIndex Score
21 records- 0192US9560800B2Quick change rotary mower blade assemblyDEERE & CO·Filed 2014·Granted Feb 7, 2017·22 cites·8 claims
- 0292US5138825ARiding mower having a pedal operated height adjustment mechanism, air assisted discharge, and improved hydrostatic shift linkageNOMA OUTDOOR PRODUCTS INC·Filed 1990·Granted Aug 18, 1992·73 cites·35 claims
- 0389US5351467AHeight adjustment mechanism for riding mower cutting deckNOMA OUTDOOR PRODUCTS INC·Filed 1993·Granted Oct 4, 1994·56 cites·15 claims
- 0483US6644002B2Walk-behind self-propelled power equipment unit with speed controlDEERE & CO·Filed 2001·Granted Nov 11, 2003·50 cites·26 claims
- 0581US8087481B2Dual lever steering controls with control stopsTREFZ HARLIN J·Filed 2007·Granted Jan 3, 2012·19 cites·22 claims
- 0681US7669580B2Electronic engine speed control system for grass mowing machineDEERE & CO·Filed 2008·Granted Mar 2, 2010·15 cites·20 claims
- 0780US8234847B2Automatic connection mechanism for mid-mounted implementFOX ROBERT NEIL·Filed 2010·Granted Aug 7, 2012·15 cites·10 claims
- 0880US7877972B2Automatic connection mechanism for mid-mounted implementDEERE & CO·Filed 2007·Granted Feb 1, 2011·16 cites·13 claims
- 0979US6543560B1Hydrostatic transmission with integral actuatorDELTA SYSTEMS INC·Filed 2000·Granted Apr 8, 2003·33 cites·16 claims
- 1077US7278502B2Implement and power take off attachment systemDEERE & CO·Filed 2004·Granted Oct 9, 2007·23 cites·19 claims
- 1175US8255126B2Aerator having flexible frameHUNT KENNETH E·Filed 2010·Granted Aug 28, 2012·12 cites·16 claims
- 1272US3934392ADebris collector for lawn and garden machinesINT HARVESTER CO·Filed 1974·Granted Jan 27, 1976·34 cites·11 claims
- 1370US7240470B2Drive over mower deckDEERE & CO·Filed 2005·Granted Jul 10, 2007·11 cites·11 claims
- 1462US7631478B2Electric implement lift system for mower cutting unitsDEERE & CO·Filed 2006·Granted Dec 15, 2009·6 cites·14 claims
- 1558US7347037B2Transport method and apparatus for mower deckDEERE & CO·Filed 2005·Granted Mar 25, 2008·4 cites·9 claims
- 1655US7104036B2Reverse implement option using reverse pedalDEERE & CO·Filed 2004·Granted Sep 12, 2006·7 cites·6 claims
- 1754US5669212AAuxiliary blower for mower deckDEERE & CO·Filed 1996·Granted Sep 23, 1997·20 cites·9 claims
- 1851US5354241ABelt clutch control apparatusMURRAY OUTDOOR PRODUCTS INC·Filed 1993·Granted Oct 11, 1994·14 cites·11 claims
- 1946US6868925B2Engine with integral actuatorDELTA SYSTEMS INC·Filed 2001·Granted Mar 22, 2005·5 cites·26 claims
- 2046US2015296711A1Mower deck leveling systemDEERE & CO·Filed 2014·Application pending·0 cites
- 2130US5669211APivotal mounting for auxiliary blowerDEERE & CO·Filed 1996·Granted Sep 23, 1997·4 cites·5 claims
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