Title:
Door alarm
United States Patent 3197588


Inventors:
Baldwin, Charles R.
William, Baldwin
Application Number:
US9346461A
Publication Date:
07/27/1965
Filing Date:
03/06/1961
Assignee:
Baldwin, Charles R.
William, Baldwin
Primary Class:
Other Classes:
200/243, 340/542
International Classes:
E05B45/08
View Patent Images:
US Patent References:
3011163Burglar alarm1961-11-28
2835760Door switch1958-05-20
2824300Closure alarm device1958-02-18
2615083Burglar alarm system1952-10-21
2523125Switch1950-09-19
1923450Push button switch construction1933-08-22
1627357Electric-circuit-controlling apparatus1927-05-03
1608201Alarm system1926-11-23
1399170Burglar-alarm1921-12-06
0759814N/A1904-05-10
0463793N/A1891-11-24
Foreign References:
DE378980C1923-08-08
DE416658C1925-07-21