US PATENT SUBCLASS 267 / 169
.~ Including internal brace

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

166  DF  COIL {6}
169.~ Including internal brace

DEFINITION

Classification: 267/169

(under subclass 166) Spring device provided with means extending a substantial distance within the confines of the coils for limiting transaxial flexure.