Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4689190 | Method of and apparatus for molding a composite fluorocarbon helix seal | Glenn W. Peisker, Keith W. Christiansen | 1987-08-25 |
| 4501431 | Composite teflon helix seal | Glenn W. Peisker, Keith W. Christiansen | 1985-02-26 |