Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6142538 | Stab-type coupling with conduit inner diameter seal | Steven Passerell, James Lorenz | 2000-11-07 |
| 4809735 | Valve and tapping tee apparatus and method | Albert H. Reschke, Ralph L. Hart | 1989-03-07 |
| 4730636 | Valve and tapping tee apparatus and method | Albert H. Reschke, Ralph L. Hart | 1988-03-15 |
| 4487432 | No-hole insertion joint | David P. Passerell | 1984-12-11 |
| 4482170 | Gas riser apparatus | Irvin D. Jacobson, Carl E. Passerell | 1984-11-13 |
| 4418888 | Angle cock valve | Irvin D. Jacobson, David P. Passerell | 1983-12-06 |
| 4282175 | Stab-type coupling and method | David P. Passerell | 1981-08-04 |
| 4229025 | Stab-type coupling | David P. Passerell | 1980-10-21 |
| 4216793 | Shutoff valve | Albert H. Reschke, David P. Passerell, Raymond A. Day | 1980-08-12 |