Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7000280 | Aggressive pipeline pig | — | 2006-02-21 |
| 6613261 | Molded pipeline pig with hardness variations | — | 2003-09-02 |
| 6145150 | Multi-dimensional pig including wiper disk permitting passage through | — | 2000-11-14 |
| 6038725 | Unicast paraffin removing pipeline pig incorporating multiple diameter and thickness discs and having a central bending portion for turns | — | 2000-03-21 |
| 6014789 | Multiple tube cleaning pig featuring replaceable disks anchoring cleaning studs | — | 2000-01-18 |
| 5967699 | Method and apparatus for launching a pig in a vertical riser pipe | — | 1999-10-19 |
| 5895619 | Method for casting a bidirectional foam pig | — | 1999-04-20 |
| 5533224 | Foam pig with scraper strips | — | 1996-07-09 |
| 5032185 | Method and apparatus for removing paraffin from a fouled pipeline | — | 1991-07-16 |
| 4726089 | Pipeline pig construction including threaded mandrel and nut for supporting resilient cups or discs | — | 1988-02-23 |
| 4648744 | Method and apparatus for positioning optical fibers in a buried conduit | — | 1987-03-10 |
| 4603449 | Unitized pig body for parafin removal | — | 1986-08-05 |
| 4509222 | Pig featuring foam filled cavity | — | 1985-04-09 |
| 4506401 | Bristle pig cup | — | 1985-03-26 |
| 4242771 | Pipeline pig | — | 1981-01-06 |