Patents by Inventor Per Olof Hedekvist

Per Olof Hedekvist 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 system for one-way time transmission
    Patent number: 8615170
    Abstract: A method of controlling a timing state of a local oscillator (17) being synchronized by a timing signal (ST1) provided through one-way transmission from a remote master oscillator (6) through a dielectric waveguide (4).
    Type: Grant
    Filed: November 11, 2010
    Date of Patent: December 24, 2013
    Assignee: SP Svergies Tekniska Forskningsinstitut AB
    Inventors: Per Olof Hedekvist, Sven-Christian Ebenhag
  • METHOD AND SYSTEM FOR ONE-WAY TIME TRANSMISSION
    Publication number: 20120213529
    Abstract: A method of controlling a timing state of a local oscillator (17) being synchronized by a timing signal (ST1) provided through one-way transmission from a remote master oscillator (6) through a dielectric waveguide (4).
    Type: Application
    Filed: November 11, 2010
    Publication date: August 23, 2012
    Applicant: SP SVERIGES TEKNISKA FORSKNINGSINSTITUT AB
    Inventors: Per Olof Hedekvist, Sven-Christian Ebenhag
  • Optical logic gates based on the polarization properties of four-wave mixing
    Publication number: 20020054404
    Abstract: Logic operations are carried out among multiple optical signals based on their wavelength. The logic operations can be based on four wave mixing which produces an output based on polarizations of the inputs. The same circuit can be caused to carry out multiple truth tables. Applications are disclosed for adding, logical inversion, and error correction. The error correction can take the form of parity bit generation or correction of data bits.
    Type: Application
    Filed: March 16, 2001
    Publication date: May 9, 2002
    Inventors: Per Olof Hedekvist, Ashish Bhardwaj, Kerry J. Vahala