Patents by Inventor Frederick H. Koster

Frederick H. Koster 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).

  • Patent number: 4744102
    Abstract: An arrangement for improved two-line hunting in crossbar switching systems is disclosed where the two lines are located in the same line link frame vertical group and vertical file. When the marker determines that the primary line is busy the marker is caused to recycle and to reseize the number group and retranslate the directory number of the primary appearance. When the marker re-obtains the equipment location information for the primary line appearance, it directly modifies one element of the translation information, illustratively, the horizontal group number, to obtain the equipment location of the auxiliary line appearance. Since the marker directly modifies the translation information furnished by the number group it is not necessary to assign a separate directory number to the auxiliary line appearance. The direct modification of the equipment location is performed by providing a selectively operable chain path in the operating path of the horizontal group seizure relays.
    Type: Grant
    Filed: January 27, 1986
    Date of Patent: May 10, 1988
    Inventor: Frederick H. Koster