Patents by Inventor Wen-Han Chang

Wen-Han 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).

  • Publication number: 20090050727
    Abstract: A positioning rod structure for a reel is disclosed. The reel is positioning upon pulling out of cord from the reel and will restore to its original position if the cord is pulled for a second time. When the cord is pulled for one round, a positioning of the cord is done, and the pulling of the cord provides multi control of the cord, accordingly, the pulling of cord is precisely controlled.
    Type: Application
    Filed: August 23, 2007
    Publication date: February 26, 2009
    Inventor: WEN-HAN CHANG
  • Publication number: 20090050099
    Abstract: A positioning peg structure of a single-pull reel is disclosed. The positioning structure provides the function of positioning of the cord after a second pull following the first pull of the cord. When the cord is pulled to rotate one round, a first positioning mechanism is formed. Thus, when the cord is pulled in one direction once, the cord is controlled to provide a plurality of multiple positioning such that the pulling distance can be precisely controlled.
    Type: Application
    Filed: August 23, 2007
    Publication date: February 26, 2009
    Inventor: WEN-HAN CHANG
  • Patent number: 7356362
    Abstract: A headset having a built-in audio source and cable management mechanism is disclosed herein. The headset is composed of two loop-style earpieces and a cable connecting the two earpieces. One earpiece has a built-in audio source such as a MP3 player, an AM/FM receiver, and the like. The cable is for delivering audio signal from the audio source built in one earpiece to the other. The other earpiece has a built-in cable winder so that the cable could be pulled and fixed to a desired length. When the headset is not in use, a slight pull and release of the cable would allow the cable winder to retract the cable back into the earpiece.
    Type: Grant
    Filed: June 9, 2005
    Date of Patent: April 8, 2008
    Inventors: Wen-Han Chang, Chin-Ming Lu
  • Patent number: 7222811
    Abstract: A positioning device of a dual direction cable reel is disclosed. The cable reel comprises a top cover, a pad, a reeling disc top cover, a reeling disc, a lead wire, a spring, a bottom cover and positioning member, characterized in that the reeling disc and the positioning element mounted at the outer side of the bottom cover alternately interact to achieve a positioning function, wherein the positioning element includes a peg and a pulling spring and the peg is pivotally mounted to the peg at the outer edge of the bottom cover, and the rear direction is a pulling spring to provide correct direction, and can swing in accordance with the operational rails at the bottom section of the reeling disc to provide an alternate engaging and disengaging swinging action.
    Type: Grant
    Filed: November 12, 2004
    Date of Patent: May 29, 2007
    Inventor: Wen-Han Chang
  • Patent number: 7222812
    Abstract: A positioning shaft of a dual direction cable reel is disclosed.
    Type: Grant
    Filed: November 12, 2004
    Date of Patent: May 29, 2007
    Inventors: Wen-Han Chang, Chih-Ming Lu
  • Publication number: 20070086613
    Abstract: A multi-media loudspeaker which includes a primary loudspeaker case connected with a transmission cable, a loudspeaker, a microphone, a headphone socket, and a volume control, a secondary loudspeaker case connected with the primary loudspeaker case via a cord, a retractable coiling cord device connected with the cord, the retractable coiling cord device comprising a front cover, a spiral spring, a sliding disc, a retraction cord, a positioning bead and a rear cover, and a cable reel connected with the transmission cable, the cable reel comprising an upper cover, a pad, a reeling disc, a spring, and a lower cover, whereby the multi-media loudspeaker can be used for converting electrical signals into sounds loud enough to be heard at a distance and converting sound waves into electrical energy thereby enabling the user to listen to the music and talk through the computer via the Internet.
    Type: Application
    Filed: October 14, 2005
    Publication date: April 19, 2007
    Inventors: Wen-Han Chang, Chin-Ming Lu
  • Publication number: 20070080943
    Abstract: A computer mouse which includes a circuit board disposed within the body portion, a loudspeaker mounted on the circuit board, a microphone mounted on the circuit board, a switch mounted on the circuit board and extending upwardly out of the body portion, a volume control mounted on the circuit board and extending laterally out of the body portion, an electrical socket mounted on the circuit board, a cable provided with a USB connector, a loudspeaker connector, a microphone connector, and a cable reel connected with the cable, whereby the computer mouse can be used for converting electrical signals into sounds loud enough to be heard at a distance and converting sound waves into electrical energy thereby enabling the user to listen to the music and talk through the computer via the Internet.
    Type: Application
    Filed: October 6, 2005
    Publication date: April 12, 2007
    Inventors: Wen-Han Chang, Chin-Ming Lu
  • Publication number: 20060281502
    Abstract: A headset having a built-in audio source and cable management mechanism is disclosed herein. The headset is composed of two loop-style earpieces and a cable connecting the two earpieces. One earpiece has a built-in audio source such as a MP3 player, an AM/FM receiver, and the like. The cable is for delivering audio signal from the audio source built in one earpiece to the other. The other earpiece has a built-in cable winder so that the cable could be pulled and fixed to a desired length. When the headset is not in use, a slight pull and release of the cable would allow the cable winder to retract the cable back into the earpiece.
    Type: Application
    Filed: June 9, 2005
    Publication date: December 14, 2006
    Inventors: Wen-Han Chang, Chin-Ming Lu
  • Publication number: 20060102765
    Abstract: A positioning device of a dual direction cable reel is disclosed. The cable reel comprises a top cover, a pad, a reeling disc top cover, a reeling disc, a lead wire, a spring, a bottom cover and positioning member, characterized in that the reeling disc and the positioning element mounted at the outer side of the bottom cover alternately interact to achieve a positioning function, wherein the positioning element includes a peg and a pulling spring and the peg is pivotally mounted to the peg at the outer edge of the bottom cover, and the rear direction is a pulling spring to provide correct direction, and can swing in accordance with the operational rails at the bottom section of the reeling disc to provide an alternate engaging and disengaging swinging action.
    Type: Application
    Filed: November 12, 2004
    Publication date: May 18, 2006
    Inventor: Wen-Han Chang
  • Publication number: 20060102766
    Abstract: A positioning shaft of a dual direction cable reel is disclosed.
    Type: Application
    Filed: November 12, 2004
    Publication date: May 18, 2006
    Inventors: Wen-Han Chang, Chih-Ming Lu
  • Patent number: 6871812
    Abstract: A multi-stages retractable coiling cord is disclosed. The coiling cord comprises a front cover, a spiral spring, a sliding disc, a retraction cord, a positioning bead and a rear cover. The cord is retracted and is positioned once when the sliding disc rotates once. A slight pull will allow the coiling cord to release from engaging.
    Type: Grant
    Filed: January 20, 2004
    Date of Patent: March 29, 2005
    Inventor: Wen-Han Chang