Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4938183 | Method of making and apparatus for monoblock engine construction | Nathaniel L. Field | 1990-07-03 |
| 4858670 | Method of making and apparatus for monoblock engine construction | Nathaniel L. Field | 1989-08-22 |
| 4708105 | Chamber construction for internal combustion engine | George F. Leydorf, Jr. | 1987-11-24 |
| 4699100 | Chamber construction for internal combustion engine | George F. Leydorf, Jr. | 1987-10-13 |