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| All Patents in class 318/37 | |||||
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| Number | Date | Patentee | Title | Type | |
| 200,032 | Feb. 05, 1878 | T.A. Edison | Synchronous Movements for Electric Telegraphs | telegraphic apparatus | |
| 2,315,993 | Apr. 06, 1943 | C.S. Weyandt, E.J. Missien | Percussion tool | handheld power tools | |