Patents by Inventor Alex Y. Chan

Alex Y. Chan 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).

  • Telephone headset adaptor including a hearing sound tube, a speaking sound tube, a headset, a telephone ear cup and a telephone mouth cup
    Patent number: 5528689
    Abstract: An adaptor for converting a hand-held telephone into a headset telephone. The inventive device includes a headset wearable by an individual for audibly coupling an individual's ear and mouth to a pair of sound tubes. The sound tubes extend from the headset to removably couple with a hand-held telephone, whereby sound is transmitted between the headset and the telephone through the sound tubes. The present invention serves to permit a hands-free utilization of the associated cellular phone, and further to place the cellular phone a greater distance from the user's head to reduce exposure to potentially hazardous radiation generated by the cellular phone.
    Type: Grant
    Filed: November 7, 1994
    Date of Patent: June 18, 1996
    Inventor: Alex Y. Chan