File. (open access)

File.

Patent for a new and improved file. This design consists in "[a] file provided with longitudinal teeth upon one or both of its edges . . . [and] upon its sides so cut that they extend only half-way across the width of the file, the inner ends of the said teeth meeting at an angle at the center of the width of the blade" (lines 50-56).
Date: March 18, 1884
Creator: Custer, George.
System: The Portal to Texas History