David A. Ball

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Westerville, OH, US

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Patents Grantslast 30 patents

Information Patent Grant
Involute spiral wrap device
- Patent number 6,464,467
- Issue date Oct 15, 2002
- Battelle Memorial Institute
- Timothy J. Sullivan
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Power supply
- Patent number 6,285,178
- Issue date Sep 4, 2001
- Battelle Memorial Institute
- David A. Ball
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Mid-efficiency furnace with multiple venting option
- Patent number 6,112,741
- Issue date Sep 5, 2000
- Gas Research Institute
- George H. Stickford
- F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
Information Patent Grant
Heating system
- Patent number 6,109,339
- Issue date Aug 29, 2000
- First Company, Inc.
- Sherwood G. Talbert
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Absorption refrigeration and heat pump system
- Patent number 4,667,485
- Issue date May 26, 1987
- Gas Research Institute
- David A. Ball
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...

Patents Applicationslast 30 patents

Information Patent Application
HEAT ENERGY UTILIZATION SYSTEM
- Publication number 20040020206
- Publication date Feb 5, 2004
- Timothy J. Sullivan
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
Involute spiral wrap device
- Publication number 20010043878
- Publication date Nov 22, 2001
- Timothy J. Sullivan
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...