Patents by Inventor Alan J. Lang

Alan J. Lang 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).

  • Method of predicting visual acuity with change of spherocylindrical refractive error
    Patent number: 5709218
    Abstract: The present invention is directed to a method for predicting visual acuity to the subject due to change in spherocylindrical refractive error of the subject's eye utilizing measurements of uncorrected visual acuity, corrected visual acuity and spherical cylindrical refractive error. A defocus equivalent is calculated and predictions of uncorrected visual acuity is made through the use of a defocused acuity graph.
    Type: Grant
    Filed: April 15, 1996
    Date of Patent: January 20, 1998
    Assignee: Allergan
    Inventors: Jack T. Holladay, Alan J. Lang, Valdemar Portney
  • Hand gun grip with concealed fasteners
    Patent number: 4315379
    Abstract: An improved hand gun grip comprising a body of resilient elastomeric material defining an outer gripping surface and an interior conforming to the frame of the hand gun to which it is to be attached, and including a plurality of mating surfaces having matching recesses. Dumb-bell shaped fasteners rest in the matching recesses and include an enlarged surface bearing against the recess to maintain the grip halves in compressed edge engagement. A peripheral ridge cooperates with the fasteners to insure tight edge contact.
    Type: Grant
    Filed: February 19, 1980
    Date of Patent: February 16, 1982
    Inventor: Alan J. Lang