Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7054042 | Optically variable security device | Brian William Holmes, Kenneth John Drinkwater | 2006-05-30 |
| 6903850 | Security device | Brian William Holmes | 2005-06-07 |
| 6712399 | Security device | Kenneth John Drinkwater, Marianne Michelle Anton | 2004-03-30 |
| 6364983 | Manufacture of security tapes and security threads | — | 2002-04-02 |
| 6344245 | Security device manufacture | — | 2002-02-05 |
| 5851615 | Tamper indicating security item and joining method | — | 1998-12-22 |
| 5665194 | Image enhancement | — | 1997-09-09 |
| 5492370 | Decorative article | Charles E. Chatwin | 1996-02-20 |
| 5319475 | Tamper resisting holographic security seal | Keith A. Jones, Adam J. Silk | 1994-06-07 |
| 5310222 | Optical device | Charles E. Chatwin, Martin C. Gomme, David Ezra | 1994-05-10 |
| 4747620 | Security card and security card blank | Martin C. Gomme | 1988-05-31 |