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| All Patents in class 224/413 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 1,801,443 | Apr. 21, 1931 | F. Mesinger | Tool Holder | ||
| 2,358,671 | Sep. 19, 1944 | W.H. Trippe | Detachable Power Unit Using Solid Fuel for Bicycles | ||