Patents by Inventor Lisa Frederickson

Lisa Frederickson 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).

  • Trellis code with improved error propagation
    Patent number: 6105159
    Abstract: A digital communication apparatus (20) transmits sectors of digital values that include error correction values used to detect and correct errors within the sector. Each sector consists of a number of blocks (70, 72, 74) and the error correction values of each block (70) are useful in correcting up to a maximum number of erroneous digital units (78, 84) in that block (70). The digital communication apparatus (20) encodes the blocks of digital units to transmit them through a channel (32) and then decodes the channel's representation of those encoded blocks, where the channel's representation occasionally contains burst errors.
    Type: Grant
    Filed: December 5, 1997
    Date of Patent: August 15, 2000
    Assignee: Seagate Technology, Inc.
    Inventor: Lisa Frederickson