Kumataka; Shinji
Patent Applications and Registrations
Patent applications and USPTO patent grants for Kumataka; Shinji.The latest application filed is for "cordless key telephone system having zone switching function".
- Kumataka; Shinji - Tokyo JP
| Patent | Date |
|---|---|
| Cordless key telephone system having zone switching function Grant 5,454,028 - Hara , et al. September 26, 1 | 1995-09-26 |
| Cordless key telephone system for covering multiple service areas having exclusively assigned control channels Grant 5,283,817 - Hara , et al. February 1, 1 | 1994-02-01 |
| Cordless key telephone system capable of quickly answering incoming calls Grant 5,239,572 - Saegusa , et al. August 24, 1 | 1993-08-24 |
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