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| All Patents in class 228/24 | |||||
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| Number | Date | Patentee | Title | Type | |
| 263,481 | Aug. 29, 1882 | J. Charlton | Machine for Welding Tubes | ||
| 773,735 | Nov. 01, 1904 | T.H. Griffitts | Power Hammer | power hammers | |