Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4362327 | Separable pipe and/or armature connection | — | 1982-12-07 |
| 4344453 | Pipeline switch with leakage control and cleanable leakage cavity | Otto A. P. Tuchenhagen, Herbert Robert Coura | 1982-08-17 |