Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6250337 | Mechanical plug assembly | — | 2001-06-26 |
| 6182704 | Frangible sealing plug for pipelines | — | 2001-02-06 |
| D421792 | Two piece mechanical plug assembly | — | 2000-03-21 |
| D398254 | Pneumatic test plug | — | 1998-09-15 |
| D398380 | Pneumatic plug with large bypass | — | 1998-09-15 |
| D369652 | Miniature pneumatic test plug assembly | Allen D. Mathison | 1996-05-07 |
| D358871 | Remote positioning pneumatic plug | Allen D. Mathison | 1995-05-30 |
| 5353841 | Pneumatic plug for clean-out tees | Allen D. Mathison, Bryan Benson | 1994-10-11 |
| D350704 | Pneumatic test plug | Allen D. Mathison, Bryan Benson | 1994-09-20 |
| 5329646 | Drain flusher device | Steven J. Hiemsoth | 1994-07-19 |
| D339405 | Drain flusher | Steven J. Hiemsoth | 1993-09-14 |
| 5035266 | Mechanical plug for clean-out tees | Bryan Benson | 1991-07-30 |