William E. Chelen

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Pittsburgh, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Time and frequency windowed pocket cardiac stethoscope
- Patent number 6,999,592
- Issue date Feb 14, 2006
- William E. Chelen
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Automatic laser pet toy and exerciser
- Patent number 6,651,591
- Issue date Nov 25, 2003
- William E. Chelen
- A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING

Patents Applicationslast 30 patents

Information Patent Application
Time and frequency windowed pocket cardiac stethoscope
- Publication number 20040028236
- Publication date Feb 12, 2004
- William E. Chelen
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE