Patents by Inventor Sik Cheung Chow

Sik Cheung Chow 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).

  • Gear-enabled wringing device
    Patent number: 6615437
    Abstract: A gear-driven cleaning device having two gear components attached to the elongate handle. The first gear component providing torque for driving the second gear component which drives a wringing component. The cleaning device also having a pawl and ratchet arrangement for preventing the handle from rotating in a predetermined direction during the wringing process.
    Type: Grant
    Filed: April 12, 2000
    Date of Patent: September 9, 2003
    Assignee: May's Industries, Ltd.
    Inventor: Sik Cheung Chow