Title:
CIRCUIT OPERATING DEVICE FOR SWIMMING POOL ALARM SYSTEM
United States Patent 3504145


Inventors:
Layher, Francis W.
Application Number:
US3504145DA
Publication Date:
03/31/1970
Filing Date:
05/17/1967
Assignee:
Francis, Layher W.
Primary Class:
Other Classes:
200/61.2, 340/573.1, 340/624
International Classes:
G08B21/08; H01H35/18; (IPC1-7): H01H35/18
View Patent Images:
US Patent References:
3204232N/A1965-08-31
3058101Pool safety device1962-10-09
2717935Safety device for hydraulic brakes1955-09-13