Isaak; Robert D.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Isaak; Robert D..The latest application filed is for "secure communication system".
- Isaak; Robert D. - San Diego CA
| Patent | Date |
|---|---|
| Secure communication system Grant 5,805,635 - Andrews, Jr. , et al. September 8, 1 | 1998-09-08 |
| Secure communication keying system Grant 5,493,612 - Klund , et al. February 20, 1 | 1996-02-20 |
| Encoded echo-ranging signal generator Grant 3,958,214 - Andrews, Jr. , et al. May 18, 1 | 1976-05-18 |
| Secure Communication System Grant 3,614,316 - Andrews, Jr. , et al. October 19, 1 | 1971-10-19 |
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