Patents by Inventor Yen Hung-Hsu

Yen Hung-Hsu 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).

  • Structure of alarm clock
    Patent number: 5708629
    Abstract: An alarm clock including clock having a control circuit with a solenoid switch, and a rack having an upright post with a magnet, wherein when the alarm circuit of the clock is ringing, the battery lid and the alarm button of the clock are locked if the clock is not put in the rack; when the lock is put in the rack as the alarm circuit of the clock is ringing, a solenoid switch is induced by a magnet in the rack to unlock the battery lid and the alarm button, for permitting the user to turn off the alarm.
    Type: Grant
    Filed: August 26, 1996
    Date of Patent: January 13, 1998
    Inventor: Yen Hung-Hsu