Patents by Inventor Shi C. Ho

Shi C. Ho 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).

  • Door closing device with a belt-shaped spiral spring
    Patent number: 4783881
    Abstract: A door closing device utilizing the elastic restoring force of a belt-shaped spiral spring to effect the closing of a door which comprises a housing having one portion fixed a door or a door frame; a reel rotatably disposed in the housing; a belt-shaped spiral spring wound on the reel having an end portion extending out from the housing with the end portion fixed to a door frame or a door.
    Type: Grant
    Filed: April 9, 1985
    Date of Patent: November 15, 1988
    Inventor: Shi C. Ho