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| All Patents in class 315/326 | |||||
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| Number | Date | Patentee | Title | Type | |
| 9,846 | Jul. 12, 1853 | E.B. Wells | Adjusting dishing-saws | circular saws | |
| 447,920 | Mar. 10, 1891 | N. Tesla | Method of operating arc lamps | electric arc lamps | |
| 455,069 | Jun. 30, 1891 | N. Tesla | Electric incandescent lamp | ||