Darwood; James R.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Darwood; James R..The latest application filed is for "telephone ring detector circuit".
- Darwood; James R. - Anaheim CA
- Darwood; James R. - Cerritos CA
- Darwood; James R. - Paramount CA
| Patent | Date |
|---|---|
| Telephone ring detector circuit Grant 4,066,848 - Darwood January 3, 1 | 1978-01-03 |
| Telephone answering system with ring detector Grant 3,979,560 - Darwood September 7, 1 | 1976-09-07 |
| Telephone answering apparatus Grant 3,968,329 - Darwood July 6, 1 | 1976-07-06 |
| Telephone answering system with remote playback Grant 3,903,369 - Darwood September 2, 1 | 1975-09-02 |
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