US PATENT SUBCLASS 409 / 307
.~.~ Inside hollow work

Current as of: June, 1999
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409 /   HD   GEAR CUTTING, MILLING, OR PLANING

288  DF  PLANING {14}
304  DF  .~ Means for cutting groove {2}
307.~.~ Inside hollow work

DEFINITION

Classification: 409/307

Inside hollow work:

(under subclass 304) Apparatus particularly adapted to cutting on an inwardly facing surface of a generally enclosed or shell-like workpiece.

SEE OR SEARCH THIS CLASS, SUBCLASS:

143, for apparatus for milling a groove inside a hollow workpiece.

306, for apparatus for planing an arcuate groove inside a gun barrel.