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| Patents for Bror J. Lindgren | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 1,486,974 | Mar. 18, 1924 | B.J. Lindgren | Barrel-seaming machine | |
 | 1,486,976 | Mar. 18, 1924 | B.J. Lindgren | Machine for compressing corrugated pipes | |
 | 1,486,977 | Mar. 18, 1924 | B.J. Lindgren | Corrugating machine | |
 | 1,945,282 | Jan. 30, 1934 | B.J. Lindgren | Supporting structure for punch presses and the like | |