(under subclass 431) Subject matter providing a ready templet, guide, aid or assistor for suitably correctly mounting the lock operating mechanism or its associated housing.
SEE OR SEARCH CLASS
33, Geometrical Instruments,
197, for mortise gauges.
144, Woodworking,
75+, for mortising apparatus.
408, Cutting by Use of Rotating Axially Moving Tool, 72+, for jigs for guiding drills.