Patents by Inventor Tu Randy

Tu Randy has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • USB AUDIO DEVICE
    Publication number: 20130322653
    Abstract: A USB audio device includes a USB connector for connection to a general purpose computer, a USB controller connected to the USB connector for receiving an digitized audio signal from the computer and transmitting a digitized microphone signal and a controlling signal to the computer system, a digital/analog converter connected to the USB controller for processing the audio signal and the microphone signal and an earset socket connected to the digital/analog converter and having a left signal contact, a right signal contact, a ground contact, and a microphone signal contact.
    Type: Application
    Filed: August 1, 2012
    Publication date: December 5, 2013
    Applicant: FORMOSA21 Inc.
    Inventors: TSAI Yu-Fen, Chang Jung-Chin, Tu Randy, Lin Shar-Ming