Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4818265 | Barrier apparatus and method of use for melting and refining glass or the like | John F. Krumwiede | 1989-04-04 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4818265 | Barrier apparatus and method of use for melting and refining glass or the like | John F. Krumwiede | 1989-04-04 |