Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5423251 | Plastic frame system having a triangular support post | Albert Kolvites, Robert J. Cohn, John H. Welsch, Willard J. Sickles, Rodney E. Brancher | 1995-06-13 |
| 5279231 | Plastic frame system having a triangular support post | Albert Kolvites, Robert J. Cohn, John H. Welsch, Willard J. Sickles, Rodney E. Brancher | 1994-01-18 |
| 5271337 | Plastic frame system having a triangular support post | Albert Kolvites, Robert J. Cohn, John H. Welsch, Willard J. Sickles, Rodney E. Brancher | 1993-12-21 |
| 4964350 | Plastic frame system having a triangular support post | Albert Kolvites, Robert J. Cohn, John H. Welsch, Willard J. Sickles | 1990-10-23 |
| 4938823 | Pultrusion/extrusion method | Thomas J. Griffiths, David Pearson | 1990-07-03 |