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James West. Electret Microphone

harry brown
in The Black Excellence Showcase

Featured Replies

Read. James. West. Patented. The. Electret   Microphone. In. 1962 .His. Electret   Microphone. Can. Be. Found. Today. In. Phones ,Hearing. Aids. Baby. Monitors. And. More. Devices. ....Black. Inventors. In. Technology. ..James. West ....

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