Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7947030 | Retrograde perfusion of tumor sites | — | 2011-05-24 |
| 7914514 | Computerized system for monitored retrograde perfusion of tumor sites | — | 2011-03-29 |
| 4883459 | Retrograde perfusion | — | 1989-11-28 |
| 4867742 | Retrograde perfusion | — | 1989-09-19 |
| 4714460 | Methods and systems for retrograde perfusion in the body for curing it of the disease or immume deficiency | — | 1987-12-22 |
| 4306428 | Torque drive mechanism | Billy H. Towell | 1981-12-22 |
| 4293037 | Method of forming and assembling a self-cleaning helical spring screen | — | 1981-10-06 |
| 4277348 | Methods for cleaning a helical spring filter | — | 1981-07-07 |
| 4260016 | Self-cleaning helical spring sand screen | — | 1981-04-07 |
| 4249292 | Method of assembling self-cleaning helical spring filter | — | 1981-02-10 |
| 4237978 | Method for cleaning a helical spring sand screen in a well | Billy H. Towell | 1980-12-09 |
| 4227576 | Method for cleaning a helical spring sand screen | — | 1980-10-14 |
| 4201266 | Rotatable washer self-cleaning helical spring screen and methods | Billy H. Towell | 1980-05-06 |