Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5714213 | Securtiy element | Walter Trachslin | 1998-02-03 |
| 5538753 | Security element | Walter Trachslin | 1996-07-23 |
| 5109767 | Device for the embossing of fine structures | Alex Nyfeler, Hansjorg Schmidlin | 1992-05-05 |
| 5106125 | Arrangement to improve forgery protection of credit documents | — | 1992-04-21 |
| 5104471 | Interlaminar sandwich with diffraction structure | Ohannes Minnetian | 1992-04-14 |
| 5101184 | Diffraction element and optical machine-reading device | — | 1992-03-31 |
| 5059776 | Bar code field and bar code reader | — | 1991-10-22 |
| 5032003 | Optially variable surface pattern | — | 1991-07-16 |
| 4984824 | Document with an optical diffraction safety element | Christian Saxer | 1991-01-15 |
| 4761253 | Method and apparatus for producing a relief pattern with a microscopic structure, in particular having an optical diffraction effect | — | 1988-08-02 |
| 4685138 | System for the display and scanning of the contents of a counter equipped with counting wheels | Mathis Halder, Paul D. Fuchs, Peter Gehr | 1987-08-04 |
| 4568141 | Document having an optical-diffraction authenticating element | — | 1986-02-04 |
| 4556378 | Apparatus for embossing high resolution relief patterns | Alex Nyfeler, Peter Gehr, Martin Stalder | 1985-12-03 |
| 4544266 | Apparatus and a method for testing the authenticity of documents | — | 1985-10-01 |
| 4501439 | Document having a security feature and method of determining the authenticity of the document | — | 1985-02-26 |
| 4297001 | Projection screen and method for making same | David L. Greenaway | 1981-10-27 |