Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885871 | Audibly locking shoe system for take-out window | James A. Martini, John I. Habbersett | 1989-12-12 |
| 4837976 | Window balance spring cover friction system | Patrick E. Milligan | 1989-06-13 |
| 4811455 | Window spring anchor | Wilford G. Ost | 1989-03-14 |
| 4800680 | Cord guide system for sash balance | Patrick E. Milligan, John I. Habbersett, Brian S. Dense | 1989-01-31 |
| 4799333 | Lock shoe system for take-out window | James A. Martini, John I. Habbersett | 1989-01-24 |