US PATENT SUBCLASS 144 / 80
.~ Oscillating chisel

Current as of: June, 1999
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144 /   HD   WOODWORKING

75  DF  MORTISING MACHINE HAVING CHISEL {5}
80.~ Oscillating chisel {1}
81  DF  .~.~> Portable

DEFINITION

Classification: 144/80

Oscillating chisel:

(under subclass 75) Machine which has a bar upon the end of which is a pivoted chisel having its edge at right angles to the bar and which is oscillated and cuts its way into the wood to form a mortise.