Patents by Inventor Niranjan Kumar Doshi

Niranjan Kumar Doshi 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).

  • Power-converting device
    Patent number: 4061445
    Abstract: A positive-displacement, steam-driven engine has a generally-elliptical rotor which is mounted within a cylindrical chamber. That rotor reciprocates as it rotates within that chamber; and interacting surfaces halt continued movement of that rotor whenever it reaches an end of its path of reciprocation, and then smoothly start that rotor moving back toward the opposite end of that path of reciprocation.
    Type: Grant
    Filed: May 10, 1976
    Date of Patent: December 6, 1977
    Assignee: Frank Apostol
    Inventor: Niranjan Kumar Doshi