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| All Patents in class 177/208 | |||||
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| Number | Date | Patentee | Title | Type | |
| 957,471 | May 10, 1910 | C.J. Manning | Pressure Gage | vacuum and pressure gauges | |
| 1,533,281 | Apr. 14, 1925 | H.E. Tautz | Testing machine | ||
| 2,190,967 | Feb. 20, 1940 | H.W. Zimmerman | Torque measuring wrench | torque wrenches | |
| 2,191,725 | Feb. 27, 1940 | B. Pepperdine | Torque Measuring Wrench | torque wrenches | |
| 2,339,031 | Jan. 11, 1944 | I.D. Rosenberg | Micrometer | micrometers | |
| 2,882,036 | Apr. 14, 1959 | L.J. Lyons | Conveyor Weighing Scale | scales and balances | |