Patents by Inventor David E. Swanson

David E. Swanson 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: 5987034
    Abstract: A frame relay communications network consists of a number of interconnected nodes. The network nodes include segmentation and reassembly device for fragmenting variable length frames of user data into packets of a predefined length. A preferred embodiment uses ATM AAL5 segmentation and reassembly to construct cells. Header and trailer information is added to each of the cells for transport across the frame relay network.
    Type: Grant
    Filed: August 30, 1996
    Date of Patent: November 16, 1999
    Assignee: Cisco Technology, Inc.
    Inventors: Robert Simon, Mark Rumer, Robert A. Land, David E. Swanson
  • Patent number: 5372195
    Abstract: A method for directional hydraulic fracturing using borehole seals to confine pressurized fluid in planar permeable regions, comprising: placing a sealant in the hole of a structure selected from geologic or cemented formations to fill the space between a permeable planar component and the geologic or cemented formation in the vicinity of the permeable planar component; making a hydraulic connection between the permeable planar component and a pump; permitting the sealant to cure and thereby provide both mechanical and hydraulic confinement to the permeable planar component; and pumping a fluid from the pump into the permeable planar component to internally pressurize the permeable planar component to initiate a fracture in the formation, the fracture being disposed in the same orientation as the permeable planar component.
    Type: Grant
    Filed: September 13, 1993
    Date of Patent: December 13, 1994
    Assignee: The United States of America as represented by the Secretary of the Interior
    Inventors: David E. Swanson, Daniel W. Daly
  • Patent number: 4966237
    Abstract: Method of sealing a cavity formed in a rock against the passage of fluids without fracturing the rock, by placing wadding in the cavity and adding a supply of expanding chemical grout to effect a seal upon hardening.
    Type: Grant
    Filed: July 20, 1989
    Date of Patent: October 30, 1990
    Assignee: The United States of America as represented by the Secretary of the Interior
    Inventors: David E. Swanson, Michael X. Schlumpberger