Patents by Inventor Jan Wesolowski

Jan Wesolowski 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 managing reference signals for network clock synchronization
    Patent number: 6356156
    Abstract: Methods and systems are disclosed for eliminating a phase transient of a controlled frequency oscillator, caused by replacing a first reference signal by a second reference signal when the first reference signal becomes corrupted or otherwise unavailable, and for running a controlled frequency oscillator in a frequency-controlled holdover mode. The contradictory requirements of using a relatively low-cost controlled frequency oscillator tunable over a relatively wide frequency range and achieving high stability of its frequency in holdover mode are satisfied.
    Type: Grant
    Filed: May 4, 2001
    Date of Patent: March 12, 2002
    Assignee: Network Equipment Technologies, Inc.
    Inventor: Jan Wesolowski
  • Method and system for managing reference signals for network clock synchronization
    Publication number: 20010015678
    Abstract: Methods and systems are disclosed for eliminating a phase transient of a controlled frequency oscillator. caused by replacing a first reference signal by a second reference signal when the first reference signal becomes corrupted or otherwise unavailable, and for running a controlled frequency oscillator in a frequency-controlled holdover mode. The contradictory requirements of using a relatively low-cost controlled frequency oscillator tunable over a relatively wide frequency range and achieving high stability of its frequency in holdover mode are satisfied.
    Type: Application
    Filed: May 4, 2001
    Publication date: August 23, 2001
    Inventor: Jan Wesolowski
  • Method and system for managing reference signals for network clock synchronization
    Patent number: 6259328
    Abstract: Methods and systems are disclosed for eliminating a phase transient of a controlled frequency oscillator caused by replacing a first reference signal by a second reference signal when the first reference signal becomes corrupted or otherwise unavailable, and for running a controlled frequency oscillator in a frequency-controlled holdover mode. The contradictory requirements of using a relatively low-cost controlled frequency oscillator tunable over a relatively wide frequency range and achieving high stability of its frequency in holdover mode are satisfied.
    Type: Grant
    Filed: December 17, 1999
    Date of Patent: July 10, 2001
    Assignee: Network Equipment Technologies, Inc.
    Inventor: Jan Wesolowski