US PATENT SUBCLASS 181 / 157
DIAPHRAGM

Current as of: June, 1999
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181 /   HD   ACOUSTICS

157DIAPHRAGM {10}
158  DF  .~> Microphone type
159  DF  .~> With horn
160  DF  .~> With resonant chamber
161  DF  .~> With direct mechanical connection to drive unit {1}
163  DF  .~> Plural dependent diaphragms
164  DF  .~> Sectional diaphragm {1}
166  DF  .~> With damping means
167  DF  .~> Critically defined material or coating {3}
171  DF  .~> Mounting or suspension means {1}
173  DF  .~> Particular shape {1}

DEFINITION

Classification: 181/157

(under the class definition) Subject matter including a vibratable partition which is designed to produce sound waves when driven.

SEE OR SEARCH THIS CLASS, SUBCLASS:

144+, for plural, independent diaphragms.

148+, for diaphragms included with an enclosure.

SEE OR SEARCH CLASS

381, Electrical Audio Signal Processing Systems and Devices,

398, for diaphragm and electrical means to move the diaphragm.