Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4848875 | Dual-pane thermal window with liquid crystal shade | Ray H. Baughman, Ernest D. Buff, Helmut Eckhardt | 1989-07-18 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4848875 | Dual-pane thermal window with liquid crystal shade | Ray H. Baughman, Ernest D. Buff, Helmut Eckhardt | 1989-07-18 |