US PATENT SUBCLASS 409 / 309
.~.~ Concave work surface (e.g., bearing, stereotype printing plate, etc,)

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

288  DF  PLANING {14}
308  DF  .~ Means for shaving by blade spanning work surface {4}
309.~.~ Concave work surface (e.g., bearing, stereotype printing plate, etc,)

DEFINITION

Classification: 409/309

Concave work surface (e.g., bearing, stereotype printing plate, etc.):

(under subclass 308) Apparatus particularly adapted to remove a very thin layer of the inside of an inwardly curved surface.

SEE OR SEARCH THIS CLASS, SUBCLASS:

901, for an art collection of making of a stereotype printing surface by means other than planing.