Stofer; Walter
Patent Applications and Registrations
Patent applications and USPTO patent grants for Stofer; Walter.The latest application filed is for "method and installation for masked speech transmission over a telephone channel".
- Stofer; Walter - Buchs CH
| Patent | Date |
|---|---|
| Method and installation for masked speech transmission over a telephone channel Grant 4,188,506 - Schmid , et al. February 12, 1 | 1980-02-12 |
| Method and apparatus for the scrambled transmission of spoken information via a telephony channel Grant 4,068,094 - Schmid , et al. January 10, 1 | 1978-01-10 |
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