Patents by Inventor Lawrence A. Westhaver

Lawrence A. Westhaver 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).

  • 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
  • Method and apparatus for battery charging
    Patent number: 4639655
    Abstract: A method and apparatus are disclosed for charging series connected batteries, particularly nickel cadmium. The means and method described are used for charging single or multiple batteries. In the form of multiple batteries the batteries are charged sequentially in time. A programmed microprocessor controls the constant current source which provides a mean constant charging current to the battery under charge. By monitoring battery voltage during charging the processor will terminate charging when certain conditions occur. In addition, provision is made for termination of battery charging upon occurrence of certain abnormal conditions.
    Type: Grant
    Filed: April 19, 1984
    Date of Patent: January 27, 1987
    Inventors: Lawrence A. Westhaver, Ronald E. Ruksznis