Feistel; Horst
Patent Applications and Registrations
Patent applications and USPTO patent grants for Feistel; Horst.The latest application filed is for "variant key matrix cipher system".
- Feistel; Horst - Lexington MA
- Feistel; Horst - Mount Kisco NY
| Patent | Date |
|---|---|
| Variant key matrix cipher system Grant RE30,957 - Feistel June 1, 1 | 1982-06-01 |
| High security system for electronic signature verification Grant 4,326,098 - Bouricius , et al. April 20, 1 | 1982-04-20 |
| Stream/block cipher crytographic system Grant 4,316,055 - Feistel February 16, 1 | 1982-02-16 |
| Variant key matrix cipher system Grant 4,195,196 - Feistel March 25, 1 | 1980-03-25 |
| Key controlled block-cipher cryptographic system employing a multidirectional shift matrix Grant 4,195,200 - Feistel March 25, 1 | 1980-03-25 |
| Centralized Verification System Grant 3,798,605 - Feistel March 19, 1 | 1974-03-19 |
| Block Cipher Cryptographic System Grant 3,798,359 - Feistel March 19, 1 | 1974-03-19 |
| Step Code Ciphering System Grant 3,798,360 - Feistel March 19, 1 | 1974-03-19 |
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