Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4832111 | Process for casting molten metal | Max Riethmann | 1989-05-23 |
| 4809763 | Method of and apparatus for producing molds and mold sections and cores | — | 1989-03-07 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4832111 | Process for casting molten metal | Max Riethmann | 1989-05-23 |
| 4809763 | Method of and apparatus for producing molds and mold sections and cores | — | 1989-03-07 |