Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4557627 | Apparatus and method for tunnel construction with shield drive | Walter Schmid | 1985-12-10 |
| 4392954 | Sewage ventilating basin | Alfred Scherler | 1983-07-12 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4557627 | Apparatus and method for tunnel construction with shield drive | Walter Schmid | 1985-12-10 |
| 4392954 | Sewage ventilating basin | Alfred Scherler | 1983-07-12 |