US Patent 7190804 Speaker apparatus

Patent 7190804 was granted and assigned to Pioneer Corporation on March, 2007 by the United States Patent and Trademark Office.

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Patent

Patent attributes

Current Assignee

Pioneer Corporation

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

71908040

Patent Inventor Names

Tohru Nakamura0

Tomohiro Suenaga0

Date of Patent

March 13, 2007

Patent Application Number

107186460

Date Filed

November 24, 2003

Patent Primary Examiner

‌

Curtis Kuntz

Patent abstract

This invention provides a speaker apparatus that outputs sound having smooth frequency characteristics. To solve the inconvenience with the prior art, this invention is a speaker apparatus comprising a diaphragm and a cylindrical-shaped coil bobbin, and not comprising a center cap that covers the coil bobbin, and where the diaphragm is located such that it rests on the coil bobbin, and the coil bobbin and diaphragm are located such that sound from the coil bobbin and diaphragm is not reflected.

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