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| Patents for Charles May | |||||
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| Number | Date | Patentee | Title | Type | |
| GB-184,410,358 | Oct. 22, 1844 | C. May, J. Nasmyth | Working atmospheric railways; machinery for constructing the apparatus employed therein | railroads | |
| 1,460,837 | Jul. 03, 1923 | F. May, A. Bangert | Wrench | combination tools | |