(under the class definition) Implement wherein the tool* is shaped, or a plurality of tools are arranged, (a) to engage a work surface which is concave or convex, or (b) to simultaneously engage (1) the opposing edges or surfaces of slit or groove, (2) angularly related or noncoplanar surfaces of a workpiece, or (3) opposite surfaces of a workpiece.
SEE OR SEARCH CLASS
33, Geometrical Instruments,
41.1+, for an implement including a plurality of scribing tools for making spaced, parallel, relatively narrow lines on a curved or on plural work surfaces.
