US PATENT SUBCLASS 116 / 80
.~.~.~ Key or keyhole

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

67 R  DF  ALARMS {15}
75  DF  .~ Burglar {5}
77  DF  .~.~ Portable {7}
80.~.~.~ Key or keyhole

DEFINITION

Classification: 116/80

(under subclass 77) Devices in which means are provided whereby the key or keyhole is utilized in securing the device to the door, the alarm being actuated by the insertion, the attempt to insert, or the turning of the key in the keyhole.

SEE OR SEARCH CLASS

200, Electricity: Circuit Makers and Breakers,

61.64+, particularly subclass 61.66 for key operated switches.