Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4866818 | Pinch clip | — | 1989-09-19 |
| 4811570 | Sleeve assembly with attached duct and drain connections for a through the wall air conditioning unit | William B. Jennings, Richmond S. Hayes, Jr. | 1989-03-14 |