Speaker device
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Apr 16, 2002
Grant Date -
N/A
app pub date -
Jan 24, 2000
filing date -
Jul 21, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A speaker frame is constructed from dried paper pulp. Features in the speaker frame such as holes or slits are formed by carbonizing corresponding sections in the dried paper pulp and applying shear processing to remove the carbonized material. A carbonizing mold contains protrusions corresponding to the sections in the dried pulp to be carbonized. The result is a high quality speaker frame that is biodegradable and can be produced economically.
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