US PATENT SUBCLASS 256 / 39
.~.~ Spring
Current as of: June, 1999
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DEFINITION
Classification: 256/39
(under subclass 37) Devices that employ the power of a spring to accomplish the stretching.
SEE OR SEARCH CLASS
54, Harness,
48, for elastic stirrups.
267, Spring Devices,
69+, for elastic extension devices.