Issued Patents All Time
Showing 51–75 of 89 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5640749 | Method of and device for elongating and relaxing a stud | — | 1997-06-24 |
| 5539970 | Method of and device for elongating and relaxing a stud | — | 1996-07-30 |
| 5538379 | Mechanical tensioner for and method of elongating and relaxing a stud and the like | — | 1996-07-23 |
| 5520076 | Socket for turning a threaded connector by a power tool | — | 1996-05-28 |
| 5499558 | Fluid operated tool for elongating and relaxing a threaded connector | — | 1996-03-19 |
| D364882 | Bolt tensioner | — | 1995-12-05 |
| 5467671 | Fluid-operated torque tool | — | 1995-11-21 |
| D363770 | Connector for fluid-operated tools | — | 1995-10-31 |
| 5429017 | Fluid-operated torque tool | — | 1995-07-04 |
| 5406867 | Mechanical tensioner | Peter Koppenhoefer | 1995-04-18 |
| 5341560 | Method of elongating and relaxing a stud | — | 1994-08-30 |
| 5318397 | Mechanical tensioner | — | 1994-06-07 |
| 5311796 | Hydraulic tool | — | 1994-05-17 |
| 5140874 | Fluid-operated wrench | — | 1992-08-25 |
| 5137408 | Fastening device | — | 1992-08-11 |
| RE33951 | Fluid operated wrench | — | 1992-06-09 |
| 5029497 | Continuous ratchet drive | — | 1991-07-09 |
| 5016502 | Power wrench | — | 1991-05-21 |
| 5007153 | Method for tightening threaded connectors | — | 1991-04-16 |
| 5005447 | Torque wrench | — | 1991-04-09 |
| 4974476 | Fluid-operated wrench | — | 1990-12-04 |
| 4916986 | Fluid operated wrench | — | 1990-04-17 |
| 4846028 | Fluid-operated wrench | — | 1989-07-11 |
| 4825730 | Fluid operated wrench | — | 1989-05-02 |
| 4753139 | Fluid-operated wrench | — | 1988-06-28 |