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US Patent: 455,787
Balance-wheel for time-pieces
Patentee: Hugo Bilgram (exact or similar names) - Philadelphia, PA USPTO Classifications: 368/171, 368/202 Tool Categories: trade specific : clockmaker trade specific : watchmaker Assignees: None Manufacturer: Not known to have been produced Witnesses: George E. House G. Morgan Eldridge	Patent Dates: Applied: May 24, 1890 Granted: Jul. 14, 1891 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Steve Gosselin "Vintage Machinery" entry for Hugo Bilgram, Bilgram Machine Works

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