Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886561 | Method of making an insulated window | Theodore R. Rohweder | 1989-12-12 |
| 4835045 | Fiber glass board and method of manufacture | William H. Kielmeyer, Theodore R. Rohweder | 1989-05-30 |