Ultrasonic intrusion detector
Granted 23 Nov 1982 · no office action yet
Current assignee: ADT Inc. · originally American District Telegraph Company
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Inventors: Kenneth E. Beeson, H. Patrick Thornton · Examiner: Susan J. Lucas · AU 291 · TC 2900
Life of the patent
2 dated eventsDescription
1 parts›FIG. 1 is a perspective view of an…
FIG. 1 is a perspective view of an ultrasonic intrusion detector showing our new design;
FIG. 2 is a plan view thereof on an enlarged scale;
FIG. 3 is an end view thereof on an enlarged scale; and
FIG. 4 is a plan view thereof on an enlarged scale illustrating the opposite side to that seen in FIG. 1 and FIG. 2.
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