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http://www.google.sh/patents/US3125986?utm_source=gb-gplus-share
Patent US3125986 - SONIC SIGNALING DEVICE
SONIC SIGNALING DEVICE
William K. Fortman et al
› Overview
Abstract
Drawings
Description
Claims
Patent number
: 3125986
Filing date
: 15 Nov 1962
Issue date
: 24 Mar 1964
Inventors
:
William K. Fortman
,
William K. Fortman
Current U.S. Classification
:
116/137.00A
;
116/DIG.19
;
239/99
View patent at USPTO
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Referenced by
Citing Patent
Filing date
Issue date
Original Assignee
Title
US3973250
12 Nov 1974
3 Aug 1976
Acoustically coupled burglar alarm system
US4408719
17 Jun 1981
11 Oct 1983
Sonic liquid atomizer
Drawings
Drawings
Drawings
