Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6293555 | Secondary seal for non-contacting face seals | — | 2001-09-25 |
| 5722665 | Spiral groove face seal | Artur Zobens | 1998-03-03 |
| 5702110 | Face seal with angled grooves and shallow annular groove | — | 1997-12-30 |
| 5560622 | Secondary seal for non-contacting face seal assembly | — | 1996-10-01 |
| 5558342 | Mechanical seal with spring drive | — | 1996-09-24 |
| 5556111 | Face seal with angled grooves and shallow annular groove | — | 1996-09-17 |
| 5533739 | Non-contacting seal with centering spring mounted in dovetailed grooved | — | 1996-07-09 |
| 5531458 | Face seal with angled grooves | — | 1996-07-02 |
| 5388843 | Fluid film seal | — | 1995-02-14 |
| 5370403 | Non-contacting face seal | — | 1994-12-06 |
| 4921015 | Rotary vacuum valve | — | 1990-05-01 |
| 4889348 | Spiral groove seal system for high vapor-pressure liquids | Donald E. Amundson, Jon Hamaker, Glenn G. Pecht | 1989-12-26 |
| 4290611 | High pressure upstream pumping seal combination | — | 1981-09-22 |
| 4243230 | Low energy tandem seal | Dorsey L. Baker | 1981-01-06 |
| 4212475 | Self aligning spiral groove face seal | — | 1980-07-15 |