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US Patent: 144,823
Metallic Plane Carriage Cutter Adjustment for Blockplanes
Patentee: Joseph F. Baldwin (exact or similar names) - Boston, MA USPTO Classifications: 30/489 Tool Categories: woodworking tools : planes : plane adjustment mechanisms : plane cutter adjustments woodworking tools : planes : block planes Assignees: John Sully - Dedham, MA Manufacturer: Not known to have been produced Witnesses: F. W. Howard Edward W. Dunn Samuel M. Barton Carroll D. Wright	Patent Dates: Applied: Jun. 07, 1873 Granted: Nov. 25, 1873 Patent Pictures: [ 1 | 2 ] USPTO (New site tip) Google Patents Report data errors or omissions to steward Steve Reynolds
Description: The invention is the cutter depth adjuster that consist of a screw and carriage as found on many blockplanes.

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