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Takayama; Satoshi
Hirakata, JP
No. of patents:

Patent Number Title Of Patent Date Issued
5073946 Thin speaker having an enclosure with an open portion and a closed portion December 17, 1991
A speaker which is thin but which is capable of providing high-fidelity reproduction and ensuring a suitable level of sound pressure even when it is brought close to a wall. A closed chamber is formed behind one part of a disphragm mounted in an enclosure, and an open chamber is formed b
5025474 Speaker system with image projection screen June 18, 1991
A speaker system has an acoustic diaphragm and an image projection screen provided on a surface of the diaphragm integrally therewith so as to enable the user to enjoy both realistic image on the screen and powerful sound reproduced through the diaphragm. The rear surface of the diaphrag

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