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| Patents for Mary M. Kran | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,027,803 | May 28, 1912 | E.F. Beugler | Heading-Up Machine | barrel making machines | |
| 1,062,874 | May 27, 1913 | E.F. Beugler | Machine for Making Barrel Hoops | barrel making machines | |