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US Patent: D20,017
Design for a Hammer
Patentee: Duncan L. Melvin (exact or similar names) - North Brookfield, MA USPTO Classifications: 7/147, D8/78 Tool Categories: woodworking tools : hammers trade specific : bricklayer Assignees: None Manufacturer: Not known to have been produced Witnesses: Timothy Howard L. Emerson Barnes	Patent Dates: Applied: Jun. 18, 1890 Granted: Jul. 15, 1890 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Russ Allen.
Description: Parallelopipedon shaped hammer for bricklayers. Patent term is 14 years.

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