US PATENT SUBCLASS 116 / 90
.~.~.~.~ Gear and friction wheel

Current as of: June, 1999
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116 /   HD   SIGNALS AND INDICATORS

67 R  DF  ALARMS {15}
75  DF  .~ Burglar {5}
85  DF  .~.~ Closure operated {1}
86  DF  .~.~.~ Door and window {5}
90.~.~.~.~ Gear and friction wheel

DEFINITION

Classification: 116/90

(under subclass 86) Signals and alarms actuated by gear or friction wheels attached to the moving door or window and in contact with the floor or window frame.