Patents by Inventor Suk Suet Soo

Suk Suet Soo 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).

  • Call progress signal detector
    Patent number: 4028493
    Abstract: This invention relates to apparatus for automatically connecting computer terminals and the like to telephone lines and further includes means for automatically analyzing telephone line call progress signals indicative of line status. The apparatus includes a band pass filter, variable gain amplifier, AM detector, a wave shaper, a signal cadence detector and means responsive to said cadence detector for indicating line status.
    Type: Grant
    Filed: December 22, 1975
    Date of Patent: June 7, 1977
    Assignee: International Business Machines Corporation
    Inventors: Andrew Ernest Brennemann, Suk Suet Soo