Inventor · disambiguated record
Lee A. Perkins
Also filed as: PERKINS LEE A
21 granted patents·1 pending application·769 citations·filing 1997–2024
96Inventor score
Top patents by PatentIndex Score
22 records- 0197US7287710B1Sprinkler with magnetic nutating mechanism and related methodNELSON IRRIGATION CORP·Filed 2006·Granted Oct 30, 2007·73 cites·8 claims
- 0297US6651905B2Adjustable arc, adjustable flow rate sprinklerNELSON IRRIGATION CORP·Filed 2001·Granted Nov 25, 2003·110 cites·108 claims
- 0397US6382530B1Pressure compensating drip tapeNELSON IRRIGATION CORP·Filed 2000·Granted May 7, 2002·94 cites·23 claims
- 0495US7032836B2Adjustable arc, adjustable flow rate sprinklerNELSON IRRIGATION CORP·Filed 2003·Granted Apr 25, 2006·96 cites·31 claims
- 0595US6736332B2Adjustable arc, adjustable flow rate sprinklerNELSON IRRIGATION CORP·Filed 2002·Granted May 18, 2004·102 cites·27 claims
- 0694US7942345B2Sprinkler with nutating mechanism and optional weightNELSON IRRIGATION CORP·Filed 2008·Granted May 17, 2011·37 cites·24 claims
- 0794US7562833B2Sprinkler with magnetic nutating mechanism and related methodNELSON IRRIGATION CORP·Filed 2006·Granted Jul 21, 2009·37 cites·12 claims
- 0894US7159795B2Adjustable arc, adjustable flow rate sprinklerNELSON IRRIGATION CORP·Filed 2004·Granted Jan 9, 2007·86 cites·40 claims
- 0993US9657790B2Viscous rotational speed control deviceNELSON IRRIGATION CORP·Filed 2015·Granted May 23, 2017·5 cites·16 claims
- 1093US9587687B2Viscous rotational speed control deviceNELSON IRRIGATION CORP·Filed 2015·Granted Mar 7, 2017·7 cites·16 claims
- 1188US7086608B2Shaft seal with grease retainerNELSON IRRIGATION CORP·Filed 2005·Granted Aug 8, 2006·17 cites·9 claims
- 1284US8678029B2Pressure regulator with remotely controlled shut-off valveUNGERECHT CLIFF P·Filed 2011·Granted Mar 25, 2014·15 cites·21 claims
- 1381US2025083157A1Nozzle and sprinkler for center pivot endNELSON IRRIGATION CORP·Filed 2024·Application pending·0 cites
- 1478US8336788B2Dripless rotary sprinkler and related methodPERKINS LEE A·Filed 2009·Granted Dec 25, 2012·16 cites·20 claims
- 1570US12186766B2Nozzle and sprinkler for center pivot endNELSON IRRIGATION CORP·Filed 2021·Granted Jan 7, 2025·0 cites·13 claims
- 1669US9995352B2Viscous rotational speed control deviceNELSON IRRIGATION CORP·Filed 2015·Granted Jun 12, 2018·1 cites·29 claims
- 1759US10107342B2Viscous rotational speed control device with fluid circuitNELSON IRRIGATION CORP·Filed 2016·Granted Oct 23, 2018·0 cites·18 claims
- 1859US7025287B2Shaft seal with grease retainerNELSON IRRIGATION CORP·Filed 2003·Granted Apr 11, 2006·8 cites·6 claims
- 1958US5957150AAir release valveNELSON IRRIGATION CORP·Filed 1997·Granted Sep 28, 1999·22 cites·14 claims
- 2057US6145533AAir release valveNELSON IRRIGATION CORP·Filed 1999·Granted Nov 14, 2000·17 cites·13 claims
- 2150US6276390B1Combination air release valveNELSON IRRIGATION CORP·Filed 1999·Granted Aug 21, 2001·12 cites·15 claims
- 2248US5794646AAir release valveNELSON IRRIGATION CORP·Filed 1997·Granted Aug 18, 1998·14 cites·11 claims
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