Tsushima; Masayuki
Patent Applications and Registrations
Patent applications and USPTO patent grants for Tsushima; Masayuki.The latest application filed is for "automatic telephone answering machine with ring signal responsive mode changing arrangement".
- Tsushima; Masayuki - Chofu JP
| Patent | Date |
|---|---|
| Automatic telephone answering machine with ring signal responsive mode changing arrangement Grant 5,063,589 - Tsushima November 5, 1 | 1991-11-05 |
| Recorder control apparatus for automatic telephone answering system Grant 5,010,567 - Tsushima April 23, 1 | 1991-04-23 |
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