Siefer; David A.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Siefer; David A..The latest application filed is for "wiegand effect energy generator".
- Siefer; David A. - Orange CT
- Siefer; David A. - Gloversville NY
- Siefer; David A. - North Windham ME
| Patent | Date |
|---|---|
| Wiegand effect energy generator Grant 6,191,687 - Dlugos , et al. February 20, 2 | 2001-02-20 |
| Digitizer tablet with illuminable working surface Grant 5,153,386 - Siefer , et al. * October 6, 1 | 1992-10-06 |
| One-piece razor with hinged sliding cap Grant 5,012,578 - Siefer May 7, 1 | 1991-05-07 |
| Backlit digitizer tablet Grant 4,943,689 - Siefer , et al. July 24, 1 | 1990-07-24 |
| Diesel fuel heater Grant 4,406,785 - Siefer September 27, 1 | 1983-09-27 |
| Apparatus for redirection of fuel-air mixture in carburetion system Grant 4,384,563 - Siefer , et al. May 24, 1 | 1983-05-24 |
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