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| All Patents in class 123/196S | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,143,533 | Jan. 10, 1939 | C.E. Brown, W.D. Archea | Machine Tool | grinding machines | |
| 2,225,234 | Dec. 17, 1940 | W.W. Schettler | Thermal Control of Internal Combustion Engines | engine thermostats | |