Patents by Inventor Giancarlo Grappiolo

Giancarlo Grappiolo 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).

  • Toner cartridge refilling seal using magnetic material
    Patent number: 5267003
    Abstract: A cartridge for holding toner powder has an exit opening with a surrounding flange. When a cartridge is refilled for re-use the exit opening is closed by a sliding cover. In order to minimize the leakage of toner powder around the cover, a magnetic strip is secured on the flange surrounding the cover so that leaking powder will be attracted to the magnet.
    Type: Grant
    Filed: August 11, 1992
    Date of Patent: November 30, 1993
    Assignee: Olivetti Supplies, Inc.
    Inventor: Giancarlo Grappiolo