William David Hardgrave

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Carrollton, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Thermodynamic amplifier cycle system and method
- Patent number 8,844,287
- Issue date Sep 30, 2014
- William David Hardgrave
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information Patent Grant
Extended range organic Rankine cycle
- Patent number 8,656,720
- Issue date Feb 25, 2014
- William David Hardgrave
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information Patent Grant
Downhole hydraulic ram
- Patent number 7,021,373
- Issue date Apr 4, 2006
- William David Hardgrave
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
System and method for item management via an electronic communicati...
- Patent number 6,662,078
- Issue date Dec 9, 2003
- William David Hardgrave
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Automatic item-driven system for deposit and pick-up
- Patent number 6,010,239
- Issue date Jan 4, 2000
- William David Hardgrave
- G07 - CHECKING-DEVICES

Patents Applicationslast 30 patents

Information Patent Application
Vortex Tube Supplying Superheated Vapor for Turbine Power Generation
- Publication number 20170023236
- Publication date Jan 26, 2017
- William David Hardgrave
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Application
VORTEX TUBE SUPPLYING SUPERHEATED VAPOR FOR TURBINE POWER GENERATION
- Publication number 20160047279
- Publication date Feb 18, 2016
- William David Hardgrave
- F22 - STEAM GENERATION
Information Patent Application
Downhole hydraulic ram
- Publication number 20050022997
- Publication date Feb 3, 2005
- William David Hardgrave
- E21 - EARTH DRILLING MINING