Patents by Inventor Friedrich H. R. Almer

Friedrich H. R. Almer 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).

  • Electric incandescent lamp with cylindrical filament
    Patent number: 4144473
    Abstract: An incandescent lamp has a hollow cylindrical filament which is constructed from transversal strips each traversing at least for the greater part the circumference of the cylinder at a distance from each other with longitudinal strips connecting the transversal strips together. The strips constitute electrically parallel current paths.Such filaments have improved resistance to deformation a low sensitivity for evolving hot spots, a low weight and compactness.
    Type: Grant
    Filed: May 23, 1977
    Date of Patent: March 13, 1979
    Assignee: U.S. Philips Corporation
    Inventor: Friedrich H. R. Almer