Patents by Inventor Alfred Heindl

Alfred Heindl 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 apparatus for measuring transmission characteristics of a test object during communication gaps
    Patent number: 4302843
    Abstract: A method for measuring the transmission characteristics of a transmission line during gaps in communications on said transmission line consists of monitoring the transmission line for a gap in communication thereon, and applying an identifier signal followed by a test pulse to the input of the transmission line when such a communications gap is recognized. An output of the transmission line is monitored and when the identifier signal is recognized, the test pulse which follows the identifier is evaluated. The test pulse is made up of a plurality of component frequencies at equally spaced intervals, and evaluation of the test pulse at the output yields the attenuation of phase characteristics of the transmission line for each component frequency, without interfering with communications on the line.
    Type: Grant
    Filed: November 23, 1979
    Date of Patent: November 24, 1981
    Assignee: Siemens Aktiengesellschaft
    Inventors: Karl Bauernfeind, Gerhard Blaess, Alfred Heindl