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| Patents for Charles Gross | |||||
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| Picture | Number | Date | Patentee | Title | |
| 1,814,381 | Jul. 14, 1931 | C. Gross | Friction Transmission | ||
| 1,862,155 | Jun. 07, 1932 | C. Gross, C.G. Mahana | Engine Fuel and Oil Control Means | ||
| 1,907,646 | May 09, 1933 | C. Gross | Railway Motor Car | ||