US PATENT SUBCLASS 16 / 31 R
.~ Frame

Current as of: June, 1999
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16 /   HD   MISCELLANEOUS HARDWARE

18 R  DF  CASTERS {20}
31 R.~ Frame {1}
31 A  DF  .~.~> Single leg frame or fork

Unofficial Alpha Subclasses: R A

DEFINITION

Classification: 16/31

(under subclass 18) Casters having a wheel mount or horn of specific construction.