Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5816626 | Spring lock coupling | David Campbell, Fred Georg Schroeder | 1998-10-06 |
| 5387016 | Tubular coupling | Thomas J. Joseph, Brett Walter Kalem, David C. Letteer, Timothy J. Udell, Glen W. Ostahowski | 1995-02-07 |
| 5364131 | Quick-connect tubular coupling | Dale L. Hartsock, John C. Caverly, Fred Georg Schroeder, Ronald G. Breuhan | 1994-11-15 |