Wiredal; Harry A. I.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Wiredal; Harry A. I..The latest application filed is for "thread structure for percussion rock drilling".
- Wiredal; Harry A. I. - Sandviken SE
| Patent | Date |
|---|---|
| Thread structure for percussion rock drilling Grant 4,687,368 - Eklof , et al. August 18, 1 | 1987-08-18 |
| Means for drilling Grant 4,545,443 - Wiredal * October 8, 1 | 1985-10-08 |
| Drill tool Grant 4,440,244 - Wiredal April 3, 1 | 1984-04-03 |
| Means for drilling Grant 4,408,669 - Wiredal October 11, 1 | 1983-10-11 |
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