Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4417721 | Lance tip for oxygen steelmaking | Robert D. Pehlke, Lyle J. Johnson, deceased, by Evelyn Johnson, administratrix | 1983-11-29 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4417721 | Lance tip for oxygen steelmaking | Robert D. Pehlke, Lyle J. Johnson, deceased, by Evelyn Johnson, administratrix | 1983-11-29 |