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| All Patents in class 219/221 | |||||
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| Number | Date | Patentee | Title | Type | |
| 127,270 | May 28, 1872 | G. Robinson | Improvement in electrical wood-dividers | sawblades | |
| 724,721 | Apr. 07, 1903 | M. Loewenthal | Electric Tool Holder | soldering irons | |
| 2,272,931 | Feb. 10, 1942 | E.D. Boisselier | Wire burning unit | scrollsaws | |