Patents by Inventor Yu-Che Tseng

Yu-Che Tseng 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).

  • Patent number: 5537711
    Abstract: An electric board cleaner having a housing formed of two half housings, an absorbing head having a mouth for fixing a cleaning pad, a motor with a fan vertically located in a chamber in the housing, a dust net contained in a dust chamber in the housing, a film horizontally held at a lower end of the absorbing head and able to be tilted open by a sucking force of the fan. The cleaning pad is brought into contact with the surface of a blackboard to rub and wipe chalk powder off by turning on the motor. The dust net is removable for emptying the powder stored therein.
    Type: Grant
    Filed: May 5, 1995
    Date of Patent: July 23, 1996
    Inventor: Yu-Che Tseng