Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4651796 | Edge seal and rerailer for insulating shade | Daniel L. Ingold, David A. May | 1987-03-24 |
| 4516618 | Edge seal and rerailer for insulating shade | Daniel L. Ingold, David A. May | 1985-05-14 |
| 4418739 | Insulating window covering | James Woolnough, David A. May | 1983-12-06 |