Ronald C. Spell

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Pflugerville, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Cooling headwear
- Patent number 6,481,021
- Issue date Nov 19, 2002
- Ronald C. Spell
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...

Patents Applicationslast 30 patents

Information Patent Application
Cooling headwear
- Publication number 20020035745
- Publication date Mar 28, 2002
- Ronald C. Spell
- A42 - HEADWEAR