Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4609311 | Stud hole boring and tapping machine | — | 1986-09-02 |
| 4327526 | Apparatus for grinding the internal walls of pipes | John Lewis, William E. Milligan, deceased | 1982-05-04 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4609311 | Stud hole boring and tapping machine | — | 1986-09-02 |
| 4327526 | Apparatus for grinding the internal walls of pipes | John Lewis, William E. Milligan, deceased | 1982-05-04 |