Amtsberg; Lester A.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Amtsberg; Lester A..The latest application filed is for "rotatable drill string having a torsionally elastic shaft driving connection with rock bit".
- Amtsberg; Lester A. - Utica NY
| Patent | Date |
|---|---|
| Rotatable drill string having a torsionally elastic shaft driving connection with rock bit Grant 3,939,670 - Amtsberg February 24, 1 | 1976-02-24 |
| Reciprocating hydraulic hammer Grant 3,892,279 - Amtsberg July 1, 1 | 1975-07-01 |
| Pneumatic Nut Running Tool With Governor Shut-off Control Grant 3,785,442 - Amtsberg , et al. January 15, 1 | 1974-01-15 |
| Pneumatic Tool Having Combined Nut Running And Crimping Mechanism Grant 3,747,441 - Amtsberg , et al. July 24, 1 | 1973-07-24 |
| Speed Responsive Centrifugal Governor Grant 3,740,174 - Amtsberg June 19, 1 | 1973-06-19 |
| Pneumatic Nut-runner Having A Torque Sensing Device Grant 3,645,341 - Amtsberg , et al. February 29, 1 | 1972-02-29 |
| Two-speed Dual Drive Stall Torque Nut Running Tool Grant 3,586,115 - Amtsberg , et al. June 22, 1 | 1971-06-22 |
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