Hardison G. Martin

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Audio system end of line load module providing a load on the...

Communications: electrical – Condition responsive indicating system – With particular system function
Reexamination Certificate

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Balanced amplifier device

Amplifiers – With semiconductor amplifying device – Including differential amplifier
Patent

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Courtesy announcement system and method of using

Electrical audio signal processing systems and devices – One-way audio signal program distribution – Public address system
Reexamination Certificate

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Multiple input audio program system

Patent

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Programable low impedance digital attenuators

Patent

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Profile ID: LFUS-PAI-P-1463583

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