US PATENT SUBCLASS 194 / 306
.~.~.~ Circuit includes three or more contacts

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  DF  .~ By testing material composition {4}
304  DF  .~.~ Having electric circuit completed by check {7}
306.~.~.~ Circuit includes three or more contacts

DEFINITION

Classification: 194/306

Circuit includes three or more contacts:

(under subclass 304) Apparatus including at least three contact members.