Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4637592 | Elevated swinging device for placing slag retention devices in tapping converters | Joseph A. Perri | 1987-01-20 |
| 4538795 | Device for introducing gas into molten metal in controlled streams | — | 1985-09-03 |
| 4251322 | Process for treating coke oven doors and jambs to prevent the build up of tar thereon | — | 1981-02-17 |
| 4187335 | Process for treating coke oven doors and jambs to prevent the build up of tar thereon | — | 1980-02-05 |