Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5643677 | Aminoplast/polyurethane wear layer for PVC support surface | Joseph P. Feifer, Claude R.. Rupp, William T. Sigman | 1997-07-01 |
| 4855165 | Method for making stain and scratch resistant resilient surface coverings | Nicholas C. Bolgiano, Raymond S. Hudson, William T. Sigman | 1989-08-08 |
| 4781987 | Stain and scratch resistant resilient surface coverings | Nicholas C. Bolgiano, Raymond S. Hudson, William T. Sigman | 1988-11-01 |