Campbell, Jr.; Carl M.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Campbell, Jr.; Carl M..The latest application filed is for "account file for off-line transaction authorization".
- Campbell, Jr.; Carl M. - Newtown Square PA
| Patent | Date |
|---|---|
| Account file for off-line transaction authorization Grant 5,396,624 - Campbell, Jr. March 7, 1 | 1995-03-07 |
| Transaction approval system Grant 4,822,985 - Boggan , et al. April 18, 1 | 1989-04-18 |
| Key management system for on-line communication Grant 4,605,820 - Campbell, Jr. August 12, 1 | 1986-08-12 |
| Key variable generator for an encryption/decryption device Grant 4,369,332 - Campbell, Jr. January 18, 1 | 1983-01-18 |
| Authenticator device for precluding compensating text modifications in transmitted messages Grant 4,314,097 - Campbell, Jr. February 2, 1 | 1982-02-02 |
| Authenticator code generator Grant 4,304,961 - Campbell, Jr. December 8, 1 | 1981-12-08 |
| Byte stream selective encryption/decryption device Grant 4,172,213 - Barnes , et al. October 23, 1 | 1979-10-23 |
| Link encryption device Grant 4,160,120 - Barnes , et al. July 3, 1 | 1979-07-03 |
| Communications line authentication device Grant 4,159,468 - Barnes , et al. June 26, 1 | 1979-06-26 |
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