Acoustic device, and electronic device and image forming apparatus incorporating same

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United States of America Patent

PATENT NO 9261852
SERIAL NO

14629933

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Abstract

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An acoustic device includes an opening; a flange forming the opening; a first member including the opening and the flange; and a second member joined to the first member, thereby forming a cavity. The second member is formed of a material with a density lower than a material of the first member.

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Patent Owner(s)

Patent OwnerAddress
RICOH COMPANY LTDTOKYO 143-8555

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ishida, Masahiro Kanagawa, JP 375 4376
Matsuda, Naoki Kanagawa, JP 229 1557

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