Patents Assigned to Alice de P.T. Biays
  • Underwater color correction
    Patent number: 5940231
    Abstract: A filter for underwater color correction is described which could be characterized by optical transmission exhibiting more attenuation of blue/green light than red light and having a ratio of transmission at 600 nanometers and 700 nanometers substantially less than 50%.
    Type: Grant
    Filed: August 21, 1997
    Date of Patent: August 17, 1999
    Assignees: Alice de P.T. Biays, W. Tuckerman Biays
    Inventor: Lawrence A. Westhaver
  • Underwater color correction
    Patent number: 5719715
    Abstract: A filter for underwater color correction is described which could be characterized by optical transmission exhibiting more attenuation of blue/green light than red light and having a ratio of transmission at 600 nanometers and 700 nanometers substantially less than 50%.
    Type: Grant
    Filed: December 16, 1993
    Date of Patent: February 17, 1998
    Assignees: Alice de P.T. Biays, W. Tuckerman Biays
    Inventor: Lawrence A. Westhaver