Issued Patents All Time
Showing 25 most recent of 33 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11403903 | Random sample elections | — | 2022-08-02 |
| 11184338 | Precomputed and transactional mixing | — | 2021-11-23 |
| 10536670 | Video copy prevention systems with interaction and compression | — | 2020-01-14 |
| 10375042 | Precomputed and transactional mixing | — | 2019-08-06 |
| 10050786 | Random sample elections | — | 2018-08-14 |
| 8162215 | Scan-integrity election systems | — | 2012-04-24 |
| 8123114 | Hidden-code voting and marking systems | — | 2012-02-28 |
| 7516891 | Ballot integrity systems | — | 2009-04-14 |
| 7210617 | Secret-ballot systems with voter-verifiable integrity | — | 2007-05-01 |
| 6718314 | Multi-purpose transaction card system | Niels T. Ferguson, Jelte Willem Jan Van Der Hoek | 2004-04-06 |
| 6434238 | Multi-purpose transaction card system | Niels T. Ferguson, Jelte Willem Jan Van Der Hoek | 2002-08-13 |
| 6318137 | Electronic lock that can learn to recognize any ordinary key | — | 2001-11-20 |
| 6035380 | Integrated circuit | Christopher Shelton, Martin Kelly, William E. Orme, Marius Paul Michiel Schilder, Niels T. Ferguson +3 more | 2000-03-07 |
| 5956400 | Partitioned information storage systems with controlled retrieval | Niels T. Ferguson, Berry Schoenmakers, Erik Voskuil | 1999-09-21 |
| 5878140 | Limited-traceability systems | — | 1999-03-02 |
| 5781631 | Limited-traceability systems | — | 1998-07-14 |
| 5712913 | Limited-traceability systems | — | 1998-01-27 |
| 5493614 | Private signature and proof systems | — | 1996-02-20 |
| 5485520 | Automatic real-time highway toll collection from moving vehicles | Peter L. Hendrick | 1996-01-16 |
| 5434919 | Compact endorsement signature systems | — | 1995-07-18 |
| 5373558 | Desinated-confirmer signature systems | — | 1994-12-13 |
| 5276736 | Optionally moderated transaction systems | — | 1994-01-04 |
| 5131039 | Optionally moderated transaction systems | — | 1992-07-14 |
| 4996711 | Selected-exponent signature systems | — | 1991-02-26 |
| 4991210 | Unpredictable blind signature systems | — | 1991-02-05 |