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PROXIMITY DETECTION SYSTEM USING FIELD EFFECT TRANSISTORS
US 3,543,056 A
Filed
: 08/07/1967
Issued
: 11/24/1970
Est. Priority Date
: 08/07/1967
Status: Expired due to Term
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Current Assignee
Johnson Controls International BV
(Johnson Controls International plc)
Original Assignee
Carl F. Klein
Inventors
Klein, Carl F.
Application Number
US04/658,868
Time in Patent Office
1,205 Days
Field of Search
US Class Current
327/517
CPC Class Codes
G08B 13/26
by proximity of an intruder...
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