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US Patent: 941,504
Clamp
Patentee: David A. Ducharme (exact or similar names) - Fitchburg, MA USPTO Classifications: 269/220, 269/245, 269/285 Tool Categories: work holding : clamps : hand screws Assignees: None Manufacturer: Not known to have been produced Witnesses: Austin H. Prent Frank L. Moss E. H. Waite Margaret L. Waite	Patent Dates: Applied: Oct. 19, 1908 Granted: Nov. 30, 1909 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Ralph Brendler
Description: This patent covers a typical cabinetmakers clamp with an unusual adjustment mechanism for the second arm. There are many claims about the ability for this clamp to lay flat, but this seems to not be a feature unique to this design.

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