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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.

GTX Corp. designs, develops, manufactures, and sells various products and services in the personal location services marketplace in the United States and internationally. The company offers global positioning system (GPS), Bluetooth low energy (BLE), and cellular location platform that enables subscribers to track in real time the whereabouts of people, pets, or high valued assets through a miniaturized transceiver module, wireless connectivity gateway, middleware, and viewing portal. Its products include GPS SmartSole, a wearable orthotic insole GPS tracking, monitoring, and recovery solution for those at risk of wandering due to Alzheimer's, dementia, and autism; Take Along Tracker 4G, a miniature tracking and SOS device; Sole Protector for GPS Smartsole; Take Along Friends & the Invisabelt, a GPS cellular tracking and monitoring device for young children and toddlers; Protective Medical devices and supplies, such as masks, sanitizers, face shields, UV wands, and various equipment, as well as antibody and antigen rapid test kits and hearing assisted technologies; and VeriTap, an near field communications (NFC) tag and middleware application to monitor logistics and assets in the supply chain. The company also develops and owns LOCiMOBILE, a suite of mobile tracking applications that turn smartphones and tablets, such as iPhone, iPad, Google Android, and other GPS enabled handsets into a tracking and location based real-time tracking device, which can be viewed through its tracking portal or on any connected device with internet access. In addition, it offers Track My Work Force, which allows employers to track and monitor employees, drivers, sales representatives, and others using their smartphones, tablets, or other wireless devices; and other applications. The company serves the consumer, enterprise, and military markets. GTX Corp. has collaboration with TulsaLabs. GTX Corp was founded in 2002 and is headquartered in Los Angeles, 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.