Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5570603 | Method and apparatus for cold rolling piping element connections having multiple outward steps | Michael W. Horgan, Sandra M. Lippka | 1996-11-05 |
| 5450738 | Method and apparatus for forming piping element connections having multiple outward steps | Michael W. Horgan | 1995-09-19 |
| 4552332 | Butterfly valve, especially for dead-end service | Henry R. Sonderegger | 1985-11-12 |