Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5791364 | Attachment for stopper for plastic gas pipelines | — | 1998-08-11 |
| 5778919 | Pipeline flow stopper with dual shafts | — | 1998-07-14 |
| 5606785 | Air bladder positioner for cadavers | Robert A. Shelberg | 1997-03-04 |
| 5503188 | Inflatable air bag pipeline stopper | — | 1996-04-02 |
| 5439032 | Inflatable gas pipeline stopper with dual air bag | — | 1995-08-08 |