Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4565353 | Apparatus for suppressing fume from a metal pouring operation | David Matthew Ball, Alton E. Sumsion | 1986-01-21 |
| 4486230 | Method for suppressing fume from a metal pouring operation | David Matthew Ball, Alton E. Sumsion | 1984-12-04 |