Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4726334 | Composite cylinder housing and process | Matthew W. Holtzberg, Lawrence D. Spaulding | 1988-02-23 |
| 4440069 | Composite piston and process | Matthew W. Holtzberg, Lawrence D. Spaulding, James C. Oakley | 1984-04-03 |
| 4433964 | Composite timing gears and process | Matthew W. Holtzberg, Lawrence D. Spaulding | 1984-02-28 |
| 4432311 | Composite valve spring retainer and process | Matthew W. Holtzberg, Lawrence D. Spaulding, Billy W. Cole | 1984-02-21 |
| 4430970 | Composite tappet | Matthew W. Holtzberg, Wray V. McKenzie, Jr. | 1984-02-14 |