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All Patents in class 324/97 | |||||
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Number | Date | Patentee | Title | Type | |
392,476 | Nov. 06, 1888 | E. Weston | Reflecting-galvanometer | electrical measuring apparatus | |
392,477 | Nov. 06, 1888 | E. Weston | Galvanometer | electrical measuring apparatus | |
392,478 | Nov. 06, 1888 | E. Weston | Galvanometer | electrical measuring apparatus |