Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4727013 | Method for creating a design in relief in a hard smooth substrate and apparatus for use in the method | William F. Pentak | 1988-02-23 |
| 4652513 | Method for creating a design in relief in a hard smooth substrate and apparatus for use in the method | William F. Pentak | 1987-03-24 |