Hallgren; Robert
Patent Applications and Registrations
Patent applications and USPTO patent grants for Hallgren; Robert.The latest application filed is for "welding method and apparatus".
- Hallgren; Robert - Lakemoor IL
- Hallgren; Robert - Ithaca NY
| Patent | Date |
|---|---|
| Welding method and apparatus Grant 6,926,189 - Shanks , et al. August 9, 2 | 2005-08-09 |
| Welding method and apparatus App 20030150900 - Shanks, Charles ; et al. | 2003-08-14 |
| Welding method and apparatus Grant 6,474,535 - Shanks , et al. November 5, 2 | 2002-11-05 |
| Current-steering digital-to-analog converter for providing bi-directional currents through a load Grant 4,683,458 - Hallgren July 28, 1 | 1987-07-28 |
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