Patents by Inventor Mark Porden

Mark Porden 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).

  • Patent number: 5323192
    Abstract: Fabrication of an eyeglass lens to meet a specific ophthalmic prescription is simplified by arranging back lens wafers of different sphere powers and cylinder corrections in order of the through sphere powers of the lenses that are produced by laminating each back lens wafer with front lens wafers that have the same base curve. The front lens wafers of like segment style are grouped together and include sub-groups of wafers of similar base curve which are arranged in order of add power. Each lens wafer is maintained in an individual package prior to lamination and the back wafer packages display the through sphere powers that result from laminating the wafer with different ones of the front wafers. Reference to a conventional component selection chart is unnecessary as the correct back lens wafer can be directly located from the data on the prescription and the package of the back lens wafer directs the technician to the correct front lens wafer.
    Type: Grant
    Filed: November 18, 1991
    Date of Patent: June 21, 1994
    Assignee: Pilkington Visioncare, Inc.
    Inventors: Mary Howland, Mark Porden