Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7676990 | Positive action lock for sliding windows | Clark Velzke, Teressa Dickison | 2010-03-16 |
| 5906403 | Multipoint lock for sliding patio door | Marcia K. Blom, Clark Velzke | 1999-05-25 |