Inventor
PERKINS LEE A
US21 patents
⚠️ This page may combine multiple inventors who share the name “PERKINS LEE A”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NELSON IRRIGATION CORP
19 patentsUS7287710B1Oct 30, 2007
Sprinkler with magnetic nutating mechanism and related method
NELSON IRRIGATION CORP73 citations98
US6382530B1May 7, 2002
Pressure compensating drip tape
NELSON IRRIGATION CORP94 citations98
US6651905B2Nov 25, 2003
Adjustable arc, adjustable flow rate sprinkler
NELSON IRRIGATION CORP110 citations97
US7159795B2Jan 9, 2007
Adjustable arc, adjustable flow rate sprinkler
NELSON IRRIGATION CORP86 citations96
US7032836B2Apr 25, 2006
Adjustable arc, adjustable flow rate sprinkler
NELSON IRRIGATION CORP96 citations96
US6736332B2May 18, 2004
Adjustable arc, adjustable flow rate sprinkler
NELSON IRRIGATION CORP102 citations96
US7942345B2May 17, 2011
Sprinkler with nutating mechanism and optional weight
NELSON IRRIGATION CORP37 citations92
US7562833B2Jul 21, 2009
Sprinkler with magnetic nutating mechanism and related method
NELSON IRRIGATION CORP37 citations92
US7086608B2Aug 8, 2006
Shaft seal with grease retainer
NELSON IRRIGATION CORP17 citations92
US5957150ASep 28, 1999
Air release valve
NELSON IRRIGATION CORP22 citations92
US9587687B2Mar 7, 2017
Viscous rotational speed control device
NELSON IRRIGATION CORP7 citations84
US6145533ANov 14, 2000
Air release valve
NELSON IRRIGATION CORP17 citations84
US7025287B2Apr 11, 2006
Shaft seal with grease retainer
NELSON IRRIGATION CORP8 citations74
US6276390B1Aug 21, 2001
Combination air release valve
NELSON IRRIGATION CORP12 citations74
US5794646AAug 18, 1998
Air release valve
NELSON IRRIGATION CORP14 citations74
US9657790B2May 23, 2017
Viscous rotational speed control device
NELSON IRRIGATION CORP5 citations73
US10107342B2Oct 23, 2018
Viscous rotational speed control device with fluid circuit
NELSON IRRIGATION CORP0 citations52
US9995352B2Jun 12, 2018
Viscous rotational speed control device
NELSON IRRIGATION CORP1 citations52
US12186766B2Jan 7, 2025
Nozzle and sprinkler for center pivot end
NELSON IRRIGATION CORP0 citations51