Patents by Inventor Andre Hald

Andre Hald 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).

  • Local network testing using carrier sense multiple access and collision detection (CSMA/CD)
    Patent number: 4945532
    Abstract: A tester for local networks of the carrier sense multiple access and collision detection type with a bus architecture transmission system. The network includes at least one elementary segment comprising a number of stations. The tester includes a transmission and reception circuit analagous to those of the stations, including, in addition, a collision generating device which emits a data frame when it has received from the encoding and decoding circuit associated with the transmission and reception circuit, a signal indicating the presence of a transmission of a frame by some station other than itself, and a transmission request from the transmission control circuit, this transmitted frame being received by the encoding and decoding circuit.
    Type: Grant
    Filed: March 15, 1989
    Date of Patent: July 31, 1990
    Assignee: Bull, S.A.
    Inventor: Andre Hald