Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4681806 | Particles containing releasable fill material and method of making same | Josef Matkan | 1987-07-21 |
| 4636451 | Pressure-fixable toner material and method of making same | Josef Matkin | 1987-01-13 |