Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4771810 | Multi-seal mechanical tube plug | Robert F. Keating, Lawrence A. Nelson | 1988-09-20 |
| 4765374 | Multi-seal mechanical tube plug | Robert F. Keating, Lawrence A. Nelson | 1988-08-23 |