Bie; David D.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Bie; David D..The latest application filed is for "passive radiator cooled electronics/heat sink housing for a powered speaker".
- Bie; David D. - Indian Rocks Beach FL
- Bie; David D. - Sepulveda CA
| Patent | Date |
|---|---|
| Passive radiator cooled electronics/heat sink housing for a powered speaker Grant 6,259,798 - Perkins , et al. July 10, 2 | 2001-07-10 |
| Pistonic motion, large excursion passive radiator Grant 6,176,345 - Perkins , et al. January 23, 2 | 2001-01-23 |
| Phasing plug for compression driver Grant 5,117,462 - Bie May 26, 1 | 1992-05-26 |
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