Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5701940 | Cellular shade | James A. Ford, Don Lee Bertva, Ronald Lynn Presdorf | 1997-12-30 |
| 5692550 | Cellular shade material | James A. Ford, Don Lee Bertva, Ronald Lynn Presdorf | 1997-12-02 |