Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4875181 | Method of apparatus for realizing a logical operation by modifying a flow of energy | — | 1989-10-17 |
| 4756633 | Inking ribbon including a sublimable release layer for color transfer under the influence of heat | Friedrich-Wilhelm Drees, Hartmut Grethen, Wolfgang Pekruhn | 1988-07-12 |