Hedlund; Jan-Gunnar
Patent Applications and Registrations
Patent applications and USPTO patent grants for Hedlund; Jan-Gunnar.The latest application filed is for "rock drill having an internal flushing channel".
- Hedlund; Jan-Gunnar - Sandviken SE
- Hedlund; Jan-Gunnar - Houston TX
- Hedlund; Jan-Gunnar - S-811 35 Sandviken SE
| Patent | Date |
|---|---|
| Rock drill having an internal flushing channel Grant 6,102,141 - Engstrom , et al. August 15, 2 | 2000-08-15 |
| Down-the-hole rock drill Grant 5,435,401 - Hedlund , et al. July 25, 1 | 1995-07-25 |
| Drill bit Grant 5,358,063 - Hedlund , et al. October 25, 1 | 1994-10-25 |
| Tool for cutting solid material Grant 5,112,165 - Hedlund , et al. May 12, 1 | 1992-05-12 |
| Tool for cutting solid material Grant 5,074,623 - Hedlund , et al. December 24, 1 | 1991-12-24 |
| Tool for breaking, cutting or working of solid materials Grant 4,921,310 - Hedlund , et al. May 1, 1 | 1990-05-01 |
| Method and device for working of road surfaces Grant 4,784,517 - Bergqvist , et al. November 15, 1 | 1988-11-15 |
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