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AfterMaster, Inc., together with its subsidiaries, operates as an audio technology company in the United States. It develops and commercializes proprietary audio and video technologies for professional and consumer use. The company offers AfterMaster audio, a mastering, remastering, and audio processing technology that makes various audio source sounds louder, fuller, deeper, and clearer; ProMaster, an online music mastering, streaming, and storage service designed for independent artists; and Aftermaster Pro, a personal audio re-mastering device. It also provides Aftermaster Studio Pro products for use in commercial audio applications; and MyStudio products. In addition, AfterMaster, Inc. operates six recording and mastering studios. The company was formerly known as Studio One Media, Inc. and changed its name to AfterMaster, Inc. in September 2015. AfterMaster, Inc. was incorporated in 1988 and is based in Scottsdale, Arizona.

Andrea Electronics Corporation, together with its subsidiaries, designs, develops, and manufactures digital microphone products and noise reduction software that facilitate natural language and human/machine interfaces for the computer and business enterprise markets in the United States and internationally. The company develops digital signal processing (DSP) products and technologies for the voice, speech, and natural language interface markets. Its DSP microphone and audio noise reduction software products include DA-350 auto array microphone for far-field voice intelligibility and accuracy of automatic speech recognition in automotive and mass transit environments; DA-250 OEM array microphone, a small compact stereo array microphone and DSP circuit board platform; USB-SA array microphone, which offers a USB digital audio adapter to bypass a computer's standard integrated sound system; AudioCommander, a PC audio control panel; an audio software for Mac that offers an intuitive graphic user interface to control stereo array microphone beam forming and noise cancellation on the input and EQ filters; PureAudio Live Recorder, a digital voice and audio recording application; and PureAudio Plus Recorder, which provides bookmarks for navigation of recordings. Its products are used in various applications, including mass transit and automotive communication systems, automated teller machines, information kiosks, quick service restaurant automated ordering, Internet of Things, smart building entrance intercom systems, audio and video recordings, and video surveillance. The company markets and sells its products through sales representatives to computer and kiosk OEMs and industrial system integrators. Andrea Electronics Corporation was incorporated in 1934 and is headquartered in Bohemia, New York.

Comarco, Inc. focuses on the monetization of its patent portfolio. The company intends to expand, protect, and monetize its patent portfolio through potential sale or licensing. Comarco, Inc. was founded in 1960 and is headquartered in Laguna Niguel, California.

Northstar Electronics, Inc. engages in the research and development of single engine aircraft for business use. The company was incorporated in 1998 and is based in Vancouver, Canada.

Simlatus Corp. engages in the manufacture and sale of audio-video system technologies. Its product portfolio includes protection switches, high definition routers, analog routers, control panels, sound pals, and audio distribution. It offers advanced applications utilized in the commercial and government broadcast industry. The company was founded on November 15, 2006 and is headquartered in Grass Valley, CA.