Cardinal Sound Labs, Inc.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Cardinal Sound Labs, Inc..The latest application filed is for "directional hearing system".
- Cardinal Sound Labs, Inc. - Stanford CA
| Patent | Date |
|---|---|
| Directional hearing system Grant 5,793,875 - Lehr , et al. August 11, 1 | 1998-08-11 |
| Directional hearing aid Grant 5,737,430 - Widrow April 7, 1 | 1998-04-07 |
| SEC | 0001004228 | CARDINAL SOUND LABS INC |
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