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Your search returned 100 patents.
( 705/74 in Current US Classification ) |
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| 1 |
| Patent ID | Title | Date Filed |
| 5901229 | Electronic cash implementing method using a trustee
| November 4, 1996 |
| 5889862 | Method and apparatus for implementing traceable electronic cash
| July 15, 1996 |
| 5878140 | Limited-traceability systems
| October 6, 1997 |
| 5872844 | System and method for detecting fraudulent expenditure of transferable electronic assets
| November 18, 1996 |
| 5862223 | Method and apparatus for a cryptographically-assisted commercial network system designed to facilitate and support expert-based commerce
| July 24, 1996 |
| 5855018 | Private information retrieval
| October 18, 1996 |
| 5832089 | Off-line compatible electronic cash method and system
| June 7, 1995 |
| 5812670 | Traceable anonymous transactions
| February 28, 1996 |
| 5790665 | Anonymous information retrieval system (ARS)
| January 17, 1997 |
| 5781631 | Limited-traceability systems
| August 12, 1997 |
| 5768391 | System and method for ensuring user privacy in network communications
| December 22, 1995 |
| 5768385 | Untraceable electronic cash
| August 29, 1995 |
| 5754938 | Pseudonymous server for system for customized electronic identification of desirable objects
| October 31, 1995 |
| 5754656 | Electronic shopping method, electronic shopping system and document authenticating method relating thereto
| August 1, 1996 |
| 5729537 | Method and apparatus for providing anonymous data transfer in a communication system
| June 14, 1996 |
| 5712913 | Limited-traceability systems
| February 8, 1994 |
| 5577120 | Method and apparatus for restrospectively identifying an individual who had engaged in a commercial or retail transaction or the like
| May 1, 1995 |
| 5557518 | Trusted agents for open electronic commerce
| April 28, 1994 |
| 5511121 | Efficient electronic money
| September 8, 1994 |
| 5485520 | Automatic real-time highway toll collection from moving vehicles
| October 7, 1993 |
| 5420926 | Anonymous credit card transactions
| January 5, 1994 |
| 5276736 | Optionally moderated transaction systems
| July 13, 1992 |
| 4969189 | Authentication system and apparatus therefor
| June 19, 1989 |
| 4926480 | Card-computer moderated systems
| May 24, 1988 |
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