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| All Patents in class 12/50.3 | |||||
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| Number | Date | Patentee | Title | Type | |
| 317,149 | May 05, 1885 | A.J. Langelier | Heel-machine | cobbler | |
| 331,412 | Dec. 01, 1885 | A.J. Langelier | Heel-machine | shoe and boot making machines | |
| 388,884 | Sep. 04, 1888 | A.J. Langelier | Heel-machine | shoe and boot making machines | |