Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5568210 | Envelope for transparency | Kenneth W. Luthy | 1996-10-22 |
| 5371560 | Envelope for transparency | Kenneth W. Luthy, Nancy Quan | 1994-12-06 |
| 5266987 | Envelope for transparencies | Kenneth W. Luthy | 1993-11-30 |
| 5237355 | Envelope for transparency having increased flexibility | Kenneth W. Luthy | 1993-08-17 |