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US Patent: 434,558
Device for measuring the intensity of magnetic currents
Patentee: Rudolf Eickemeyer (exact or similar names) - Yonkers, NY USPTO Classifications: 324/146, 324/259 Tool Categories: Assignees: None Manufacturer: Not known to have been produced Witnesses: James S. Fitch William C. Wood	Patent Dates: Applied: Dec. 23, 1889 Granted: Aug. 19, 1890 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Osterheld & Eickemeyer

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