Patents by Inventor Paul Coriden

Paul Coriden 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: 4113212
    Abstract: A collapsible calculator stand for pocket size electronic calculators to raise the calculator's visual display and keyboard to a better visual angle for desk use. The stand has a base adapted for attachment to the back of a calculator and a leg pivotably mounted to the base. The leg has a grooved end, an integral stop and a non-skid foot. Lateral walls having studs cooperate with the leg to help lock the collapsible stand into its proper open and collapsed positions, due to the need to flex the leg and the walls to move the leg between its open and collapsed positions. The collapsible stand is sold with a separate self-adhesive foot, adapted for attachment to the bottom edge of the calculator, which helps eliminate any tendency of the calculator to creep during use.
    Type: Grant
    Filed: June 8, 1977
    Date of Patent: September 12, 1978
    Inventor: Paul Coriden