(under subclass 86) Fastening devices to be inserted in holes cut in blocks of stone for the purpose of attaching hoisting apparatus. The lewises are usually iron dovetailed tenons which fit into dovetailed mortises cut into the stone.
SEE OR SEARCH THIS CLASS, SUBCLASS:
93+, for expanding grapples.
SEE OR SEARCH CLASS
411, Expanded, Threaded, Driven Headed, Tool-Deformed, or Locked-Threaded Fastener,
15+, for expanding anchors; and subclasses 340+ for pivoted end lock fasteners.
