Patents by Inventor Leslie Shafto

Leslie Shafto 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).

  • Direct access test unit for central office
    Patent number: 4841560
    Abstract: A direct access test unit for enabling a craftsperson at a telephone facility remote with respect to a central office to test subscriber lines comprises a first access port coupled to an access line circuit, by way of which the remote telephone facility communicates with the telephone office in the course of testing subscriber lines, and a second access port coupled to a test trunk circuit by way of which a subscriber line is to be tested by the test unit.
    Type: Grant
    Filed: October 16, 1987
    Date of Patent: June 20, 1989
    Assignee: Harris Corp.
    Inventors: Aaron Chan, Ben Pierce, Leslie Shafto