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| All Patents in class 81/474 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,771,804 | Nov. 27, 1956 | J.W. Lehde, Jr., B.R. Better | Predetermined Torque Release Wrench | torque wrenches | |
| 2,819,635 | Jan. 14, 1958 | J.W. Lehde, Jr., B.R. Better | Power Operated, Predetermined Torque Release Tool | drilling and boring tool holders | |
| 2,857,793 | Oct. 28, 1958 | L. Pèras | Torque-Limiting Tool Holder for Machine Tools | drilling and boring tool holders | |
| 3,279,286 | Oct. 18, 1966 | K.R. Larson | Pre-Set Torque Measuring Device | torque wrenches | |