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| All Patents in class 219/104 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 434,532 | Aug. 19, 1890 | E. Thomson | Process of Electric Welding | ||
 | 1,948,548 | Feb. 27, 1934 | E. Erickson, H.A. Vaughan, G. Olson | Manufacture of Single Bladed Forged Ax Heads | |
 | 1,948,549 | Feb. 27, 1934 | S.S. Vaughan | Manufacture of double bladed forged ax heads | |
| 2,447,085 | Aug. 17, 1948 | W.H. Odlum | Welded joint | ||