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DTC Communications Inc.
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Manufacture earpieces and microphones for two-way radio . Product specifications and applications.
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Telex Communications, Inc.
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Market, design and manufacture audio, wireless and multimedia communications products. Products include speakers, amplifiers, mixers, consoles, signal processors and microphones .
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Dowumi Corporation
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Manufacture bone conduction headsets for telemarketing, call centers, internet phones, and emergency service operations. Offers an explanation of bone conduction.
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OTTO Communications
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Design and manufacture noise-attenuating and lightweight headsets, earphones and remote speaker microphones . Includes a product selection and pricing guide.
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Porta Phone
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Manufacturer of football communication headsets and radios.
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