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| Patents for Ralph Kalish | |||||
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| Number | Date | Patentee | Title | Type | |
| 607,898 | Jul. 26, 1898 | V.C. Todd | Micrometer Gage | thickness gages | |
| 620,609 | Mar. 07, 1899 | F. Schwedtmann, E.S. Pillsbury | Motor | electric motors | |