Patents by Inventor Leonard E. Niessen

Leonard E. Niessen 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).

  • Controller for controlling multiple LAN types
    Patent number: 4831620
    Abstract: A local area network (LAN) system is provided that is capable of accommodating a variety of computer subsystem types, and having a LAN controller which can control at substantially the same time a plurality of LANs of the same type or a plurality of different types of LANs.
    Type: Grant
    Filed: June 13, 1988
    Date of Patent: May 16, 1989
    Assignee: Bull HN Information Systems Inc.
    Inventors: John W. Conway, Robert J. Farrell, Allen C. Hirtle, Leonard E. Niessen
  • Lan controller having split bus design
    Patent number: 4771286
    Abstract: A split bus architecture which separates the processor/processors and the procedure memory coupled to a microprocessor (.mu.P) bus from all direct memory access (DMA) devices coupled to a DMA bus. A coupler mechanism provides bus isolation of the microprocessor bus from the DMA bus and permits the processor to access devices on the DMA side when addressed. This separation allows data transfers to proceed on one side of the bus without interfereing with software execution on the other side of the bus.
    Type: Grant
    Filed: July 28, 1986
    Date of Patent: September 13, 1988
    Assignee: Honeywell Bull Inc.
    Inventors: Leonard E. Niessen, Allen C. Hirtle, Edward Beauchemin