Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4462535 | Apparatus and process for manufacture of tunnel tubes | Edward Johnston, Melvin E. Miller, Robert August Kaucic | 1984-07-31 |
| 4418561 | Apparatus for manufacture of tunnel tubes | Edward Johnston, Melvin E. Miller, Robert August Kaucic | 1983-12-06 |