Patents by Inventor Edwin L. Ost, Sr.

Edwin L. Ost, Sr. 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).

  • System and method for eliminating bell tap on analog telephones
    Patent number: 5602911
    Abstract: A system and method for modifying a composite Ring AC/Message Waiting (RAC/MW) signal to prevent bell tap on analog telephones. The composite RAC/MW signal comprises AC signals and DC signal alternately spaced in time. At a zero crossover point the composite RAC/MW signal is ramped from a given bias voltage level to a desired Message Waiting voltage level at a slope sufficient to prevent bell tap. Near the end of the Message Waiting portion of the composite signal the composite signal is ramped to the bias voltage level at a slope sufficient to prevent bell tap.
    Type: Grant
    Filed: May 10, 1993
    Date of Patent: February 11, 1997
    Assignee: Siemens Business Communication Systems, Inc.
    Inventor: Edwin L. Ost, Sr.