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US Patent: 432,418
Changeable-speed gearing
Patentees: Andrew J. Martin (exact or similar names) - Macedon, NY Lawrence Heath (exact or similar names) - Macedon, NY USPTO Classifications: 185/37, 74/353 Tool Categories: Assignees: Bickford & Huffman Co. - Macedon, NY Manufacturer: Bickford & Huffman Co. - Macedon, NY Witnesses: W. L. Acker G. W. Kirkpatrick	Patent Dates: Applied: May 20, 1890 Granted: Jul. 15, 1890 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Bickford & Huffman Co.

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