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US5615270A
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Method and apparatus for dynamic sound optimization
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US4672675A
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Multiple speaker loudspeaker with conductive bridge
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US4661874A
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Low friction cleaner for magnetic transducer head
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US4561142A
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Disc cleaner
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US4562595A
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Front panel for electronic device such as an automotive radio and method for installing same
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US4518642A
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Loudspeaker diaphragm and method for making same
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US4586100A
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Cleaning disc
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US4531234A
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Optimizing antenna interface for automobile radio receivers
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NL8204839A
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Electro-dynamic actuator for a speaker and accompanying membrane.
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US4503292A
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Cammed latching system for loudspeaker and grille
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US4550230A
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Speaker grille with snap-in fastener system
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GB2104346A
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Integral combined core and back plate for loudspeaker and process for fabricating the same
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US4414438A
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Video game controller
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US4435833A
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Fade control circuit for auxiliary amplifier
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CA1176369A
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Cleaning device
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US4465905A
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Loudspeaker assembly
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US4452480A
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Record handling device
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US4378582A
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Demagnetizing apparatus
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US4470089A
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Tape unit cleaning device
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US4303142A
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Combined acoustical transducer and grille
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