Patents by Inventor YING-FEI CHEN

YING-FEI CHEN 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).

  • VOLTAGE TESTING DEVICE
    Publication number: 20130158931
    Abstract: An exemplary voltage testing device includes a testing circuit and an oscillograph. The testing circuit includes a filtering unit, a rectifier unit, and a voltage dividing unit. The filtering unit receives and filters an alternating current (AC) voltage. The rectifier unit receives the filtered AC voltage and rectifies the filtered AC voltage into a first direct current (DC) voltage. The voltage dividing unit receives the first DC voltage, and dividess the first DC voltage into a second DC voltage equaling an effective value of the AC voltage, thereby the second DC voltage is tested and displayed on the oscillograph.
    Type: Application
    Filed: August 12, 2012
    Publication date: June 20, 2013
    Applicants: HON HAI PRECISION INDUSTRY CO., LTD., HON FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD.
    Inventors: YING-FEI CHEN, YUAN-XI CHEN, HUI LI