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| All Patents in class 340/870.16 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 1,426,735 | Aug. 22, 1922 | C.E. Reddig, W.F. Hendry | Method and Apparatus for Recording Pressure | ||
| 2,028,374 | Jan. 21, 1936 | G.R. Anderson | Torque Testing Apparatus | ||