Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5168623 | Tube puller tool assembly | — | 1992-12-08 |
| 4846895 | Remotely operated rotary tube cleaning system and method | — | 1989-07-11 |
| 4819525 | Rotary cutting tool device and method for use | — | 1989-04-11 |
| 4779333 | Sleeve to tubesheet expander tool | Robert Johnson | 1988-10-25 |
| 4779445 | Sleeve to tube expander device | — | 1988-10-25 |
| 4694549 | Method for remotely replacing tube ends in a heat exchanger | — | 1987-09-22 |
| 4694677 | Elongated tube expander tool | — | 1987-09-22 |
| 4654943 | Tube positioning tool and method for use | — | 1987-04-07 |
| 4583570 | Liquid cooled ball valve | — | 1986-04-22 |
| 4580788 | Split ring sealing device for high pressure service | Robert Johnson | 1986-04-08 |
| 4571475 | Internal bore welding torch having removable flexible wand for remote welding | — | 1986-02-18 |
| 4568061 | Flow control assembly | — | 1986-02-04 |