Patents by Inventor Chi-Tsan Chang

Chi-Tsan Chang 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).

  • Headphone
    Patent number: 8098872
    Abstract: In a headphone having a headband and two speaker units respectively pivotally mounted on the two distal ends of the headband, each speaker unit includes a speaker eccentrically positioned therein, an ear cushion covered on the front side of the speaker and having an eccentric opening, and a soft front covering the ear cushion and defining with the eccentric opening a sound chamber for enhancing the sound produced by the speaker and having sound holes for output of sound from the sound chamber to the user's ear.
    Type: Grant
    Filed: July 8, 2009
    Date of Patent: January 17, 2012
    Inventor: Chi-Tsan Chang
  • Headphone
    Publication number: 20110007928
    Abstract: In a headphone having a headband and two speaker units respectively pivotally mounted on the two distal ends of the headband, each speaker unit includes a speaker eccentrically positioned therein, an ear cushion covered on the front side of the speaker and having an eccentric opening, and a soft front covering the ear cushion and defining with the eccentric opening a sound chamber for enhancing the sound produced by the speaker and having sound holes for output of sound from the sound chamber to the user's ear.
    Type: Application
    Filed: July 8, 2009
    Publication date: January 13, 2011
    Inventor: Chi-Tsan Chang
  • Sound-box type earphone housing, headset with sound-box type earphone housings
    Patent number: 7869615
    Abstract: A sound box type earphone housing for use in a headset is disclosed to include a body shell having a coupling flange, a springy earphone clamp fastened to the inside of the body shell and having a front clamping hole for securing an earplug type earphone, and an annular cover member, which has a coupling groove coupled to the coupling flange of the body shell, a center opening hole, and a hanging portion extending around the top side of the center opening hole for hanging the annular cover member on the user's ear.
    Type: Grant
    Filed: September 6, 2006
    Date of Patent: January 11, 2011
    Inventor: Chi-Tsan Chang
  • Sound-box type earphone housing, headset with sound-box type earphone housings
    Publication number: 20080075314
    Abstract: A sound box type earphone housing for use in a headset is disclosed to include a body shell having a coupling flange, a springy earphone clamp fastened to the inside of the body shell and having a front clamping hole for securing an earplug type earphone, and an annular cover member, which has a coupling groove coupled to the coupling flange of the body shell, a center opening hole, and a hanging portion extending around the top side of the center opening hole for hanging the annular cover member on the user's ear.
    Type: Application
    Filed: September 6, 2006
    Publication date: March 27, 2008
    Inventor: Chi-Tsan Chang