Patents by Inventor CHENG-JEN TSENG

CHENG-JEN TSENG 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).

  • Indication circuit for indicating types of voltages
    Patent number: 9419386
    Abstract: An indication circuit includes a recommended standard 232 (RS232) connector, first to fourth electronic switches, first and second light-emitting diodes (LEDs), and first to fourth resistors. When the RS232 connector outputs a first voltage, the first LED emits, when the RS232 connector outputs a second voltage, the second LED emits.
    Type: Grant
    Filed: December 2, 2013
    Date of Patent: August 16, 2016
    Assignee: ENNOCONN CORPORATION
    Inventors: Shih-Chi Liu, Chia-Chun Liao, Cheng-Jen Tseng
  • INDICATION CIRCUIT FOR INDICATING TYPES OF VOLTAGES
    Publication number: 20140159909
    Abstract: An indication circuit includes a recommended standard 232 (RS232) connector, first to fourth electronic switches, first and second light-emitting diodes (LEDs), and first to fourth resistors. When the RS232 connector outputs a first voltage, the first LED emits, when the RS232 connector outputs a second voltage, the second LED emits.
    Type: Application
    Filed: December 2, 2013
    Publication date: June 12, 2014
    Applicant: ENNOCONN CORPORATION
    Inventors: SHIH-CHI LIU, CHIA-CHUN LIAO, CHENG-JEN TSENG