Patents by Inventor Steven J. Gans

Steven J. Gans 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).

  • Network interface board having memory mapped mailbox registers including alarm registers for storing prioritized alarm messages from programmable logic controllers
    Patent number: 5251302
    Abstract: A network interface board provides a communication link between a personal computer and a network bus connecting a plurality of programmable logic controllers. The network interface board mounts in an expansion slot of the personal computer. The programmable logic controllers control the operation of various machines. The network interface board includes mailbox registers for storing messages from the network, including three different queues of alarm messages which the personal computer can access in any order. These messages could be in the form of program steps, allowing the personal computer to directly program a programmable logic controller over the communication network.
    Type: Grant
    Filed: December 26, 1991
    Date of Patent: October 5, 1993
    Assignee: Square D Company
    Inventors: Edward H. Weigl, David J. Sackmann, Steven J. Gans