Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5469671 | Roof perimeter composite securing element and method of installing | Juergen O. Rathgeber, Frederick A. Kish, Syed R. Hasan | 1995-11-28 |
| 5309685 | Roof perimeter composite securing element and method of installing | Juergen O. Rathgeber, Frederick A. Kish, Syed R. Hasan | 1994-05-10 |
| 5139379 | Roofing fastener, improved screw therefor, and improved washer therefor | Syed R. Hasan, Ernest S. Santi, Juergen O. Rathgeber, John R. Beach | 1992-08-18 |
| 5042142 | Washer-dispensing and fastener-driving machine | John R. Beach, Syed R. Hasan, Donald W. Noren, Ernest S. Santi | 1991-08-27 |
| 4890968 | Stackable roofing washer | John R. Beach, Syed R. Hasan, Donald W. Noren, Ernest S. Santi | 1990-01-02 |