Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6106070 | Height-adjustable chair arm assembly | Steve J. Nemeth, Jr., Richard N. Roslund, Jr. | 2000-08-22 |
| 6059363 | Chairback with side torsional movement | Richard N. Roslund, Jr., Patrick Nelson, Larry A. Wilkerson, Joel Dral, John Clark | 2000-05-09 |
| 5961179 | Operator-interactive adjustable workstation | Perry L. Dixon, Douglas M. Thole | 1999-10-05 |
| 5951109 | Chairback with side torsional movement | Richard N. Roslund, Jr. | 1999-09-14 |
| 5853223 | Height-adjustable chair arm assembly | Steve J. Nemeth, Jr., Richard N. Roslund, Jr. | 1998-12-29 |
| 5647638 | Height-adjustable chair arm assembly | Steve J. Nemeth, Jr., Richard N. Roslund, Jr. | 1997-07-15 |
| 5539980 | Process for forming valve guide insert | James A. Kammeraad, Dwain L. Kamphuis | 1996-07-30 |
| 5493776 | Method of installing valve guide insert | James A. Kammeraad, Dwain L. Kamphuis | 1996-02-27 |
| 5355572 | Valve guide insert insertion tool | James A. Kammeraad, Dwain L. Kamphuis | 1994-10-18 |
| 5319916 | Valve stem polishing method | Bernard J. Luurtsema | 1994-06-14 |
| 5281057 | Valve guide boring fixture | — | 1994-01-25 |
| 5249555 | Valve guide insert | James A. Kammeraad, Dwain L. Kamphuis | 1993-10-05 |
| 5218788 | Valve stem polishing method and apparatus | Bernard J. Luurtsema | 1993-06-15 |
| 5161336 | Intake valve deposit removal apparatus | David A. Kammeraad | 1992-11-10 |