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US Patent: 2,891,115
Magnetic Transducer
Patentee: John W. Hogan (exact or similar names) - Minneapolis, Hennepin County, MN USPTO Classifications: 360/122, 409/96, G9B/5.104, G9B/5.18 Tool Categories: electrical devices : magnetic transducers Assignees: Gisholt Machine Co. - Madison, Dane County, WI Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Feb. 08, 1954 Granted: Jun. 16, 1959 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Gisholt Machine Co.

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