Patents by Inventor Eric L. Severtson

Eric L. Severtson 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).

  • Disk drive executing a preemptive multitasking operating system comprising tasks of varying priority
    Patent number: 7082494
    Abstract: A disk drive is disclosed for executing a preemptive multitasking operating system comprising tasks of varying priority, including a disk task for processing disk commands by initiating seek operations and configuring parameters of a read/write channel, a host task for initiating disk commands in response to host commands received from a host computer, a background task for initiating disk commands to perform background operations including a defect scan of the disk, and an execution task for arbitrating the disk commands generated by the host task and the background task and for transmitting the arbitrated disk commands to the disk task.
    Type: Grant
    Filed: December 24, 2002
    Date of Patent: July 25, 2006
    Assignee: Western Digital Technologies, Inc.
    Inventors: Gregory B. Thelin, Michael S. Rothberg, Eric L. Severtson, John Edward Lauber, Horia Cristian Simionescu
  • Disk drive employing enhanced instruction cache management to facilitate non-sequential immediate operands
    Patent number: 7055000
    Abstract: A disk drive is disclosed for executing a program comprising a plurality of instructions. The disk drive comprises a primary memory for storing the instructions, and a cache memory for caching the instructions. The cache management is enhanced by not re-filling the cache due to accessing a non-sequential immediate operand.
    Type: Grant
    Filed: August 29, 2003
    Date of Patent: May 30, 2006
    Assignee: Western Digital Technologies, Inc.
    Inventor: Eric L. Severtson
  • Method and apparatus for recording compressed data on DAT media
    Patent number: 5194995
    Abstract: A method and apparatus for storing compressed data on DAT media. The data is stored into a standard DDS group format prior to compression, and after compression, the group is stored into a variable number of frames for recording onto the DAT media. If the compression does not meet a predetermined standard of efficiency, then the group is stored in a fixed number of frames and recorded onto the DAT media without compression.
    Type: Grant
    Filed: January 9, 1991
    Date of Patent: March 16, 1993
    Assignee: WangDAT, Inc.
    Inventors: Eric L. Severtson, Roger G. Mintzlaff