US PATENT SUBCLASS 194 / 303
.~ By testing material composition

Current as of: June, 1999
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194 /   HD   CHECK-ACTUATED CONTROL MECHANISMS

302  DF  INCLUDING MEANS TO TEST VALIDITY OF CHECK {4}
303.~ By testing material composition {4}
304  DF  .~.~> Having electric circuit completed by check {7}
317  DF  .~.~> Having electric circuit influenced by check {2}
320  DF  .~.~> Having magnetic field acting on check {3}
327  DF  .~.~> Check impacts against rigid body (i.e., bounce test)

DEFINITION

Classification: 194/303

By testing material composition:

(under subclass 302) Apparatus including means for analyzing a characteristic of the substance comprising the check.