Patents by Inventor Krishna C. Doraiswamy

Krishna C. Doraiswamy 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).

  • Dry film process for altering wavelength response of holograms
    Patent number: 5024909
    Abstract: Wavelength response of volume holograms is altered by contact with a dry film diffusion element.
    Type: Grant
    Filed: June 12, 1990
    Date of Patent: June 18, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: William K. Smothers, Krishna C. Doraiswamy, Mark L. Armstrong
  • Dry film process for altering wavelength response of holograms
    Patent number: 4959283
    Abstract: Wavelength response of volume holograms is altered by contact with a dry film diffusion element.
    Type: Grant
    Filed: July 14, 1989
    Date of Patent: September 25, 1990
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: William K. Smothers, Krishna C. Doraiswamy, Mark L. Armstrong, Torence J. Trout