Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6481407 | Thin-walled valve guide insert and method for installing same within a cylinder head construction | — | 2002-11-19 |
| 6470846 | Broach tool and method of repair | Thomas Knowles, Dwain L. Kamphuis | 2002-10-29 |
| 6209509 | Bearing insert for supporting rotatable shafts, method of repair, and related broach tool | Thomas Knowles, Dwain L. Kamphuis | 2001-04-03 |
| 6099213 | Automatic boring device | Randall D. Hilbrand, R. Clayton McKeon | 2000-08-08 |
| 5539980 | Process for forming valve guide insert | Dwain L. Kamphuis, Robert T. Ritt | 1996-07-30 |
| 5493776 | Method of installing valve guide insert | Dwain L. Kamphuis, Robert T. Ritt | 1996-02-27 |
| 5355572 | Valve guide insert insertion tool | Dwain L. Kamphuis, Robert T. Ritt | 1994-10-18 |
| 5249555 | Valve guide insert | Dwain L. Kamphuis, Robert T. Ritt | 1993-10-05 |
| 4825583 | Fishing line release | — | 1989-05-02 |
| 4822061 | Valve seal retainer | — | 1989-04-18 |
| 4768479 | Oil-sealing valve guide insert and method of manufacture | — | 1988-09-06 |
| 4716674 | Rod holder adapter | — | 1988-01-05 |
| 4703580 | Collapsible planar board | — | 1987-11-03 |
| 4573340 | Valve guide liner broaching tool | — | 1986-03-04 |
| 4502696 | Valve seal retainer with multiple diameter boot base | — | 1985-03-05 |
| 4493987 | Counter | — | 1985-01-15 |
| 4417376 | Adjustable cylinder head holder | Ronald L. Tiger | 1983-11-29 |
| 4414723 | Adjustable cylinder head holder | Ronald L. Tiger | 1983-11-15 |
| 4231693 | Reamer with radial relief | — | 1980-11-04 |
| 4185368 | Method for making valve guide inserts | — | 1980-01-29 |