Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4850749 | Airlock having flaps in continuous feed of material carried by a gas stream while obstructing free flow of gas | — | 1989-07-25 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4850749 | Airlock having flaps in continuous feed of material carried by a gas stream while obstructing free flow of gas | — | 1989-07-25 |