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| All Patents in class 228/13 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 643,167 | Feb. 13, 1900 | G. Sears | Combined punching, shearing, and plow-welding machine | |
| 1,969,803 | Aug. 14, 1934 | P. Kruse | Internal seam soldering machine | ||