Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7900932 | Valve stem sealing assembly | Mark A. Leimer | 2011-03-08 |
| 7299779 | Upside-down square-up valve stem seal | Timothy A. Hegemier | 2007-11-27 |
| 6647943 | Valve stem seal assembly with locator system | Mark A. Leimer, Robert W. Lehmann | 2003-11-18 |
| 6450143 | Heavy-duty valve stem seal assembly | Timothy A. Hegemier | 2002-09-17 |
| 6244235 | Heavy-duty valve stem seal assembly | Timothy A. Hegemier | 2001-06-12 |
| 6230679 | Valve stem seal with pads and tangs | Timothy A. Hegernier, Robert W. Lehmann | 2001-05-15 |
| 6209504 | Heavy-duty valve stem seal | Timothy A. Hegemier | 2001-04-03 |
| 5553869 | Bonded valve stem seal with retainer tangs | — | 1996-09-10 |