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| All Patents in class 219/235 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,272,931 | Feb. 10, 1942 | E.D. Boisselier | Wire burning unit | scrollsaws | |
| 2,405,866 | Aug. 13, 1946 | C.E. Weller | Electrical heating apparatus | soldering irons | |
| RE23,619 | Feb. 10, 1953 | C.E. Weller | Electrical heating apparatus | soldering irons | |