Electroacoustic conversion device

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12177626
APP PUB NO 20230129491A1
SERIAL NO

17967565

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Abstract

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An electroacoustic conversion device includes a vibration plate, an inner voice coil attached to the vibration plate, an outer voice coil attached to the vibration plate outside the inner voice coil to surround the inner voice coil, a magnet, a yoke, and the frame which holds the vibration plate and the yoke. The magnet includes a wiring portion which is in a form of a through hole or a notch in which inner signal lines for the inner voice coil are provided.

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Patent Owner(s)

Patent OwnerAddress
PANASONIC AUTOMOTIVE SYSTEMS CO LTD4261 IKONOBE-CHO TSUZUKI-KU YOKOHAMA-SHI KANAGAWA 224-8520

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hattori, Kiyohisa Osaka, JP 1 0
Itoh, Satoshi Kyoto, JP 91 1465
Kagawa, Shinya Osaka, JP 8 18
Kuze, Mitsukazu Osaka, JP 42 777

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