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| Patents for Marston Allen | |||||
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| Number | Date | Patentee | Title | Type | |
| D42,397 | Apr. 09, 1912 | A. Muehlmatt | Design for an engravers's block | ||
| 1,057,762 | Apr. 01, 1913 | A. Muehlmatt | Holder for engraving-blocks | ||