Patents by Inventor Raghuvir Rai

Raghuvir Rai 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).

  • Thermal recording stylus
    Patent number: 4325071
    Abstract: A thermal recording stylus comprised of a ceramic tip with two passages from openings near a frustum-shaped end to openings at the rear, an electrical heating element wrapped around the frustum-shaped end from one opening thereof to the other, and electrical power leads extending from the ends of the heating element through the passages. The leads and heating element are secured with cement in the passages, and the entire assembly is secured in a sleeve with cement and a ring wedged between a conical section of the ceramic tip and the sleeve.
    Type: Grant
    Filed: September 15, 1980
    Date of Patent: April 13, 1982
    Assignee: Telautograph Corporation
    Inventor: Raghuvir Rai