US PATENT SUBCLASS 36 / 147
.~.~ With ventilating means

Current as of: June, 1999
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36 /   HD   BOOTS, SHOES, AND LEGGINGS

140  DF  ORTHOPEDIC BOOT OR SHOE WITH CORRECTIVE ELEMENT {4}
145  DF  .~ Arch support {8}
147.~.~ With ventilating means

DEFINITION

Classification: 36/147

With ventilating means:

(under subclass 145) Appliances in which the support includes means to provide air circulation to all or part of it.

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3, for all modifications of a boot and its parts to ventilate it.