Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4846253 | Apparatus for compressing foundry moulding material by means of compressed gas | — | 1989-07-11 |
| 4818112 | Process for mixing foundry molding materials | Thomas Parr | 1989-04-04 |