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| Patents for Thekla Andrén | |||||
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| Number | Date | Patentee | Title | Type | |
| 682,613 | Sep. 17, 1901 | B.F. Hall | Die and die-holder for punching-machines | shoe and boot making machines | |
| 682,686 | Sep. 17, 1901 | B.F. Hall | Punching-machine | shoe and boot making machines | |