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Chain lock alarm
US 3,406,386 A
Filed
: 10/04/1965
Issued
: 10/15/1968
Est. Priority Date
: 10/04/1965
Status: Expired due to Term
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Current Assignee
Maddison Hawkins Paul
Original Assignee
Maddison Hawkins Paul
Inventors
MADDISON HAWKINS PAUL
Application Number
US04/492,455
Time in Patent Office
1,107 Days
Field of Search
US Class Current
340/542
CPC Class Codes
E05B 45/06
Electric alarm locks E05B45...
E05C 17/365
Security chains
Y10T 292/283
Chain
Y10T 70/5164
Links to limit opening
Y10T 70/7915
Tampering prevention or att...
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