Patents by Inventor Benjamin C. Ruggles, Jr.

Benjamin C. Ruggles, Jr. 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).

  • Variable density ophthalmic device
    Patent number: 4119369
    Abstract: An ophthalmic device comprising superposed pairs of light polarizing elements, one pair of such elements being fixed and the other pair being rotatable with respect to the fixed pair to provide a variable light transmission feature. The fixed pair of elements is retained by a frame member having an arcuate peripheral portion which engages a rotatable light polarizing element biasing means which is fixedly attached to each rotatable light polarizing element and prevents substantial axial movement of the rotatable light polarizing element.
    Type: Grant
    Filed: August 27, 1975
    Date of Patent: October 10, 1978
    Assignee: Polaroid Corporation
    Inventors: Vaito K. Eloranta, Benjamin C. Ruggles, Jr.