US PATENT SUBCLASS 400 / 673
.~.~ Coin-controlled lock (e.g., responsive to print-lines, time, etc.)


Current as of: June, 1999
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400 /   HD   TYPEWRITING MACHINES

663  DF  LOCKING OR INTERLOCKING MECHANISM {7}
668  DF  .~ Locking means actuated in response to a condition {4}
673.~.~ Coin-controlled lock (e.g., responsive to print-lines, time, etc.)


DEFINITION

Classification: 400/673

Coin-controlled lock (e.g., responsive to print-lines, time, etc.):

(under subclass 668) Subject matter wherein the preventing means is made ineffective by using a token representing money, whereby a typewriter may be made available for hire.

(1) Note. Usually the typewriter of this subclass is operable after the insertion of a coin, and operates for a preset number of print-lines*, or character* symbols, or period of time, or any countable characteristic, after which the typewriter is inoperable.