Kaanders; Johannes Matheus Gerardus Maria
Patent Applications and Registrations
Patent applications and USPTO patent grants for Kaanders; Johannes Matheus Gerardus Maria.The latest application filed is for "hearing aid to be worn behind the ear of the user and provided with a pressure-gradient microphone".
- Kaanders; Johannes Matheus Gerardus Maria - Eindhoven NL
| Patent | Date |
|---|---|
| Hearing aid to be worn behind the ear of the user and provided with a pressure-gradient microphone Grant 4,041,251 - Kaanders August 9, 1 | 1977-08-09 |
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