Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6220373 | Drill rod with axial air passageway and method of making same | — | 2001-04-24 |
| 5735647 | Tap hole drill for steelmaking vessel | Martin Miller | 1998-04-07 |
| 5169256 | Hand connect-disconnect coupling for blast furnace tap hole drill rod assembly | Ronald Mathews | 1992-12-08 |
| 5069430 | Blast furnace tap hole drill with centralizing drill rod support | Ronald Mathews | 1991-12-03 |
| 5020780 | Quick connect-disconnect coupling for blast furnace tap hole drill bit | — | 1991-06-04 |
| 5005807 | Extension bar for blast furnace tap hole drill | Ronald Mathews | 1991-04-09 |
| 4503308 | Apparatus for preparing rod stock for forging in manufacture of sucker rods | — | 1985-03-05 |
| 4486249 | Method of making class D sucker rods | — | 1984-12-04 |
| 4478652 | Class D sucker rods | — | 1984-10-23 |
| 4468261 | Method of normalizing sucker rods using a normalizing unloader | — | 1984-08-28 |
| 4436285 | Method and apparatus for opening blast-furnace tap holes | — | 1984-03-13 |