Patents by Inventor David Leo McCall

David Leo McCall 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).

  • Patent number: 6215686
    Abstract: A memory system that includes switches for controlling data transfer that are disposed on the motherboard. The switches are selectively coupled to a controller and to connector receptacles that are adapted to receive a memory module. The memory system also includes resistors that are disposed on the motherboard for terminating data signals. In one embodiment, memory modules are accessed in pairs. That is, the data switches are used to control the flow of data signals such that data signals only flow to one pair of memory modules at any particular time. In one embodiment, the memory system of the present invention includes eight memory modules that use DDR SDRAM memory components. When 8 Mbit, 16 Mbit, 32 Mbit or 64 Mbit memory components are used, this configuration gives a range of memory configurations from 128 megabytes (Mbytes) to 1 gigabyte (Gbyte).
    Type: Grant
    Filed: August 27, 1999
    Date of Patent: April 10, 2001
    Assignee: Silicon Graphics, Inc.
    Inventors: Martin M. Deneroff, Kenneth M. Sarocky, David Leo McCall, David Edward McCracken
  • Patent number: 6115278
    Abstract: A memory system that includes switches for controlling data transfer that are disposed on the motherboard. The switches are selectively coupled to a controller and to connector receptacles that are adapted to receive a memory module. The memory system also includes resistors that are disposed on the motherboard for terminating data signals. In one embodiment, memory modules are accessed in pairs. That is, the data switches are used to control the flow of data signals such that data signals only flow to one pair of memory modules at any particular time. In one embodiment, the memory system of the present invention includes eight memory modules that use DDR SDRAM memory components. When 8 Mbit, 16 Mbit, 32 Mbit or 64 Mbit memory components are used, this configuration gives a range of memory configurations from 128 megabytes (Mbytes) to 1 gigabyte (Gbyte).
    Type: Grant
    Filed: February 9, 1999
    Date of Patent: September 5, 2000
    Assignee: Silicon Graphics, Inc.
    Inventors: Martin M. Deneroff, Kenneth M. Sarocky, David Leo McCall, David Edward McCracken