Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4686873 | Casing tong assembly | David M. Lang | 1987-08-18 |
| 4605257 | Expandable operator's cab | David M. Lang | 1986-08-12 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4686873 | Casing tong assembly | David M. Lang | 1987-08-18 |
| 4605257 | Expandable operator's cab | David M. Lang | 1986-08-12 |