US PATENT SUBCLASS 451 / 381
.~.~ Hollow work

Current as of: June, 1999
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451 /   HD   ABRADING

364  DF  WORK HOLDER {10}
365  DF  .~ Clamp {8}
381.~.~ Hollow work {1}
382  DF  .~.~.~> Hypodermic needle

DEFINITION

Classification: 451/381

Hollow work:

(under subclass 365) Clamping work holder especially adapted for holding a hollow workpiece.

(1) Note. The workpiece of this subclass is commonly made of glass.

SEE OR SEARCH CLASS

279, Chucks or Sockets,

2.01+, and 9.1+ for an expanding socket-type chuck.