Assignee
WIGGS B RYLAND
US·16 granted patents·419 citations·filing 1984–2013
Top patents by PatentIndex Score
16 records- 0198US9394771B2Single well, self-flowing, geothermal system for energy extractionWIGGS B RYLAND·Filed 2013·Granted Jul 19, 2016·58 cites·12 claims
- 0296US5272879AMulti-system power generatorWIGGS B RYLAND·Filed 1992·Granted Dec 28, 1993·113 cites·14 claims
- 0394US8997509B1Frequent short-cycle zero peak heat pump defrosterWIGGS B RYLAND·Filed 2011·Granted Apr 7, 2015·14 cites·6 claims
- 0494US8082751B2DX system with filtered suction line, low superheat, and oil provisionsWIGGS B RYLAND·Filed 2008·Granted Dec 27, 2011·28 cites·16 claims
- 0592US7938904B1Cementitious grout and methods of using sameWIGGS B RYLAND·Filed 2006·Granted May 10, 2011·25 cites·4 claims
- 0688US6971248B1Method and apparatus for inhibiting ice accumulation in HVAC systemsWIGGS B RYLAND·Filed 2002·Granted Dec 6, 2005·53 cites·23 claims
- 0787US8402780B2Oil return for a direct exchange geothermal heat pumpWIGGS B RYLAND·Filed 2009·Granted Mar 26, 2013·11 cites·17 claims
- 0882US7080524B2Alternate sub-surface and optionally accessible direct expansion refrigerant flow regulating deviceWIGGS B RYLAND·Filed 2004·Granted Jul 25, 2006·29 cites·32 claims
- 0981US8833098B2Direct exchange heating/cooling systemWIGGS B RYLAND·Filed 2008·Granted Sep 16, 2014·11 cites·10 claims
- 1081US8650875B2Direct exchange geothermal refrigerant power advanced generating systemWIGGS B RYLAND·Filed 2010·Granted Feb 18, 2014·8 cites·51 claims
- 1181US8109110B2Advanced DX system design improvementsWIGGS B RYLAND·Filed 2008·Granted Feb 7, 2012·7 cites·8 claims
- 1279US8776543B2DX system interior heat exchanger defrost design for heat to cool modeWIGGS B RYLAND·Filed 2009·Granted Jul 15, 2014·6 cites·26 claims
- 1376US8468842B2DX system having heat to cool valveWIGGS B RYLAND·Filed 2009·Granted Jun 25, 2013·5 cites·12 claims
- 1471US8931295B2Multi-faceted designs for a direct exchange geothermal heating/cooling systemWIGGS B RYLAND·Filed 2008·Granted Jan 13, 2015·3 cites·18 claims
- 1570US4725195AAdvanced piggyback water power generatorWIGGS B RYLAND·Filed 1987·Granted Feb 16, 1988·26 cites·2 claims
- 1670US4590386APiggy back water power generatorWIGGS B RYLAND·Filed 1984·Granted May 20, 1986·22 cites·4 claims
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →