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| Patents for Koch Mfg. Co. | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 710,871 | Oct. 07, 1902 | A.A. Koch | Boring and tenoning machine | |
 | 745,628 | Dec. 01, 1903 | A.A. Koch | Punching and shearing machine | |
 | CA-84,676 | Jan. 05, 1904 | A.A. Koch | Boring and tenoning machine | |