Invention Grant
- Patent Title: Audible signaling device
- Patent Title (中): 声音信号装置
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Application No.: US12012695Application Date: 2008-02-05
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Publication No.: US07880593B2Publication Date: 2011-02-01
- Inventor: Christopher M. Baldwin , Daniel O'Brien , Mark T. Monnett
- Applicant: Christopher M. Baldwin , Daniel O'Brien , Mark T. Monnett
- Applicant Address: US IN Indianapolis
- Assignee: Mallory Sonalert Products, Inc.
- Current Assignee: Mallory Sonalert Products, Inc.
- Current Assignee Address: US IN Indianapolis
- Agency: Niro, Haller & Niro
- Main IPC: G10K9/20
- IPC: G10K9/20
Abstract:
The invention is an improved audible signaling device with a speaker, a sound chamber, and associated circuitry. The device creates a loud, audible fundamental frequency, and harmonic frequencies that are relatively equal in amplitude to the amplitude of the fundamental frequency.
Public/Granted literature
- US20090195367A1 Audible signaling device Public/Granted day:2009-08-06
Information query
