Patents by Inventor David Needle

David Needle 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).

  • Time domain reflectometry apparatus and method
    Patent number: 6285195
    Abstract: A reference length of electrically conductive material having a predetermined electrical length and impedance permanently inserted in a time domain reflectometer measuring path prior to the connection point to the cable-under-test. Measurement to the start of the reference length is used to establish a reference position within the measurement path for subsequent time domain reflectometry measurements.
    Type: Grant
    Filed: March 16, 1998
    Date of Patent: September 4, 2001
    Inventor: David Needle