Patents by Inventor James Vallance

James Vallance 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 and device for wavelength locking
    Patent number: 6560252
    Abstract: A system for wavelength locking i.e. for maintaining a frequency of an optical signal to within predetermined limits has means for splitting part of the controlled optical signal into at least three sub-beams of which one is a reference beam and two others are provided to an optical element having a periodic output response and to a filter having a monotonic output response. The three detected outputs are analyzed and processed to determine accurately the wavelength of the optical signal and to produce a correcting signal if it is not within the predetermined limits.
    Type: Grant
    Filed: July 20, 2000
    Date of Patent: May 6, 2003
    Assignee: JDS Uniphase Inc.
    Inventors: Paul Colbourne, Jasvinder Obhi, Derek J. Glennie, James Vallance
  • Fall arrest strap
    Patent number: D449136
    Type: Grant
    Filed: October 30, 1996
    Date of Patent: October 9, 2001
    Inventor: Richard James Vallance