Chelen; William E.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Chelen; William E..The latest application filed is for "time and frequency windowed pocket cardiac stethoscope".
- Chelen; William E. - Pittsburgh PA
| Patent | Date |
|---|---|
| Time and frequency windowed pocket cardiac stethoscope Grant 6,999,592 - Chelen February 14, 2 | 2006-02-14 |
| Time and frequency windowed pocket cardiac stethoscope App 20040028236 - Chelen, William E. | 2004-02-12 |
| Automatic laser pet toy and exerciser Grant 6,651,591 - Chelen November 25, 2 | 2003-11-25 |
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