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US Patent: 675,864
Automatic Driver Brake Retainer
Patentee: William T. Simpson (exact or similar names) - Battle Creek, Calhoun County, MI USPTO Classifications: 303/76 Tool Categories: transportation : railroads : railroad locomotives : locomotive air brake apparatus Assignees: Michigan Lubricator Co. - Detroit, Wayne County, MI Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: May 03, 1900 Granted: Jun. 04, 1901 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Michigan Lubricator Co.

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