Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5554685 | Method of making a sign having raised characters | Robert W. Williams, Arnold R. Wolfe | 1996-09-10 |
| 5504144 | Composition of matter for raised characters and method for manufacturing raised characters for use in signs | Robert W. Williams, Arnold R. Wolfe | 1996-04-02 |
| 5449240 | Apparatus for embossing Braille labels | Robert W. Williams, Arnold R. Wolfe | 1995-09-12 |