Issued Patents All Time
Showing 25 most recent of 89 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11035512 | Apparatus for tightening threaded fasteners | Calvin A. Bonas | 2021-06-15 |
| 9308632 | Apparatus for tightening or loosening fasteners | Peter Koppenhoefer, Calvin A. Bonas | 2016-04-12 |
| 8978232 | Method for tightening and loosening threaded connectors | — | 2015-03-17 |
| 8079795 | Washer for tightening and loosening threaded connectors | — | 2011-12-20 |
| 8042434 | Safety torque intensifying tool | — | 2011-10-25 |
| 7950309 | Power-driven torque intensifier | Peter Koppenhoefer, Calin Voicu, Neil Smith, Edward Kim | 2011-05-31 |
| 7832310 | Torque power tool | — | 2010-11-16 |
| 7798038 | Reaction arm for power-driven torque intensifier | — | 2010-09-21 |
| 7765895 | Fluid-operated torque wrench for and method of tightening or loosening fasteners | — | 2010-08-03 |
| 7735397 | Fluid operated torque tool for and a method of tightening a nut on a plate on railroad crossings | — | 2010-06-15 |
| D608614 | Power operated torque tool | — | 2010-01-26 |
| 7647808 | Apparatus for calibration of fluid-operated power torque tools | — | 2010-01-19 |
| 7641579 | Eccentric gear mechanism and method of transfering turning force thereby | — | 2010-01-05 |
| D602755 | Torque wrench | — | 2009-10-27 |
| 7207760 | Washer and fastener provided with a washer | — | 2007-04-24 |
| 7125213 | Washer, fastener provided with a washer, method of and power tool for fastening objects | — | 2006-10-24 |
| 7066053 | Washer, fastener provided with a washer | — | 2006-06-27 |
| 7003862 | Power tool and method of assembling parts using a two-part separable washer | — | 2006-02-28 |
| 6986298 | Method of and power tool for fastening objects | — | 2006-01-17 |
| 6929439 | Washer for fastener and for fastening of objects | — | 2005-08-16 |
| 6883401 | Power tool for fastening objects | — | 2005-04-26 |
| D500060 | Bolting machine | — | 2004-12-21 |
| 6810571 | Method of tightening and loosening an object | — | 2004-11-02 |
| 6802235 | Fluid-operated torque wrench | Peter Koppenhoefer | 2004-10-12 |
| D491436 | Fluid operated wrench | — | 2004-06-15 |