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Wrist watch with alarm
   
Document Number
US Patent 4321699
Issued Date
March 23, 1982
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Abstract
A wrist watch with an alarm having a vibratory plate supported at a point inside the bottom housing of the wrist watch. The vibratory plate comprises a piezoelectric element, a base electrode fixed on one side of the element. Audible time sound is emitted through the bottom housing, which produces transmitted vibrations by the application of AC voltage to the piezoelectric element.
Drawing
Wrist watch with alarm - US Patent 4321699 Drawing
Drawing from US Patent 4321699
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Number of Claims:
11
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Owner
Published
March 23, 1982
Application Number
06/163,686
Filed
June 27, 1980
US Classification
368/255   968/970
Int'l Classification
G04G   13/00   (20060101)   G04G   13/02   (20060101)  
Examiner
Attorney/Law Firm
Parent Case
CROSS-REFERENCE This is a Continuation-in-part application of Ser. No. 833,148 filed Sept. 14, 1977, now abandoned.
Priority Data
Sep 17, 1976 [JP] 51-112200 Oct 23, 1976 [JP] 51-142973
USPTO Field of Search
368/72   368/73   368/74   368/159   368/250   368/255   310/334  
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Claims
Description
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