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| All Patents in class 239/549 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,395,537 | Nov. 01, 1921 | G.L. Walker | Combination Blowpipe | welding tools | |
| 1,980,065 | Nov. 06, 1934 | H.L. Johnston | Washing machine | ||