US PATENT SUBCLASS 340 / 330
.~ In and out indicators (e.g., doorbell button flashes "out" sign)

Current as of: June, 1999
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340 /   HD   COMMUNICATIONS: ELECTRICAL

286.01  DF  SYSTEMS {24}
330.~ In and out indicators (e.g., doorbell button flashes "out" sign)

DEFINITION

Classification: 340/330

(under subclass 286.01) Subject matter for signaling whether a person is "in" or "out".

(1) Note. A door bell button may, for example, cause an "out" sign to flash instead of causing the bell to ring.