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| All Patents in class 116/271 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 1,160,426 | Nov. 16, 1915 | C.J. Manning | Altitude Gage | |
 | 1,323,531 | Dec. 02, 1919 | E.R. Hewitt | Means to measure the suction in the manifolds of internal combustion engines | |
 | 1,459,420 | Jun. 19, 1923 | W.A. Shippert | Milking machine | |
| 3,226,836 | Jan. 04, 1966 | R.D. Bond | Fluid-entry-resistant gauges and method | ||