Occupancy sensor

Details Occupancy sensor Occupancy sensor

1986-06-16

1988-02-16

Kemper, Catherine E.

Measuring, testing, or signalling instruments

Security or signal instrument or casing

Alarm or control thereof

Patent

active

D02942313

REFERENCES:
patent: D234140 (1975-01-01), Gregg
patent: D236817 (1975-09-01), Sweany
patent: D258577 (1981-03-01), Bottner
patent: D269072 (1983-05-01), Sweet et al.

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