Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5248443 | Seam cleaning composition | Wendell A. Ehrhart, William T. Sigman | 1993-09-28 |
| 5198142 | Seam cleaning composition | Wendell A. Ehrhart, William T. Sigman | 1993-03-30 |
| 4933220 | Method of seam coating flooring | James R. Petzold | 1990-06-12 |