US PATENT SUBCLASS 267 / 156
.~.~ Volute

Current as of: June, 1999
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267 /   HD   SPRING DEVICES

154  DF  TORSION {1}
155  DF  .~ Coil {2}
156.~.~ Volute

DEFINITION

Classification: 267/156

(under subclass 155) Spring device in which the winding of the body is in the form of a substantially flat spiral.