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| All Patents in class 122/32 | |||||
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| Picture | Number | Date | Patentee | Title | |
| RE10,750 | Jul. 27, 1886 | S. Wilcox | Air and Gas Engine | ||
| 2,144,108 | Jan. 17, 1939 | A.K. Foulds | Heating Apparatus | ||
| 2,946,232 | Jul. 26, 1960 | G.H. Jones | Gear Drive | ||