Patents by Inventor D. Olin Johnson

D. Olin Johnson 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).

  • Biofocal type ophthalmic lens alignment determining device
    Patent number: 4196978
    Abstract: In abstract a preferred embodiment of this invention is a biofocal type ophthalmic lens alignment determining device wherein the alignment of the biofocal segment lines can be comparatively read. This invention incorporates alignment platform and a light source which projects a specially designed grid network onto a viewing screen to read and thus allow adjustment of the biofocal segment lines, the binocular pupillary distance, and the monocular pupillary distance.
    Type: Grant
    Filed: October 19, 1977
    Date of Patent: April 8, 1980
    Inventor: D. Olin Johnson