Patents by Inventor Daniel C. Abrahamson

Daniel C. Abrahamson 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: 9044159
    Abstract: Changes in the volume of residual limbs on which prosthetic sockets are worn can be measured based on bioimpedance measurements along one or more segments of the limb. A current at an appropriate frequency (e.g., in the range from 1 kHz to 1 MHz) is injected at two current electrodes that contact the skin of the residual limb. The voltage at the voltage electrodes disposed between the current electrodes is measured and using an appropriate model, the change in the segmented volume of the limb can be determined during periods of different activity and at different times during the day. This information can be used for assessing the fit of the socket and can also provide a feedback signal for automatically controlling volume management devices, to ensure a more comfortable fit when the volume of the limb is changing.
    Type: Grant
    Filed: January 27, 2012
    Date of Patent: June 2, 2015
    Assignee: University of Washington
    Inventors: Joan E. Sanders, Timothy R. Myers, Daniel S. Harrison, Katheryn J. Allyn, Ellen L. Lee, Daniel C. Abrahamson, Kirk Beach, Santosh Zachariah
  • Publication number: 20120143077
    Abstract: Changes in the volume of residual limbs on which prosthetic sockets are worn can be measured based on bioimpedance measurements along one or more segments of the limb. A current at an appropriate frequency (e.g., in the range from 1 kHz to 1 MHz) is injected at two current electrodes that contact the skin of the residual limb. The voltage at the voltage electrodes disposed between the current electrodes is measured and using an appropriate model, the change in the segmented volume of the limb can be determined during periods of different activity and at different times during the day. This information can be used for assessing the fit of the socket and can also provide a feedback signal for automatically controlling volume management devices, to ensure a more comfortable fit when the volume of the limb is changing.
    Type: Application
    Filed: January 27, 2012
    Publication date: June 7, 2012
    Applicant: UNIVERSITY OF WASHINGTON
    Inventors: Joan E. Sanders, Timothy R. Myers, Daniel S. Harrison, Katheryn J. Allyn, Ellen L. Lee, Daniel C. Abrahamson, Kirk Beach, Santosh Zachariah
  • Patent number: 8142369
    Abstract: Changes in the volume of residual limbs on which prosthetic sockets are worn can be measured based on bioimpedance measurements along one or more segments of the limb. A current at an appropriate frequency (e.g., in the range from 1 kHz to 1 MHz) is injected at two current electrodes that contact the skin of the residual limb. The voltage at the voltage electrodes disposed between the current electrodes is measured and using an appropriate model, the change in the segmented volume of the limb can be determined during periods of different activity and at different times during the day. This information can be used for assessing the fit of the socket and can also provide a feedback signal for automatically controlling volume management devices, to ensure a more comfortable fit when the volume of the limb is changing.
    Type: Grant
    Filed: July 27, 2009
    Date of Patent: March 27, 2012
    Assignee: University of Washington
    Inventors: Joan E. Sanders, Timothy R. Myers, Daniel S. Harrison, Katheryn J. Allyn, Ellen L. Lee, Daniel C. Abrahamson, Kirk Beach, Santosh Zachariah
  • Publication number: 20100036455
    Abstract: Changes in the volume of residual limbs on which prosthetic sockets are worn can be measured based on bioimpedance measurements along one or more segments of the limb. A current at an appropriate frequency (e.g., in the range from 1 kHz to 1 MHz) is injected at two current electrodes that contact the skin of the residual limb. The voltage at the voltage electrodes disposed between the current electrodes is measured and using an appropriate model, the change in the segmented volume of the limb can be determined during periods of different activity and at different times during the day. This information can be used for assessing the fit of the socket and can also provide a feedback signal for automatically controlling volume management devices, to ensure a more comfortable fit when the volume of the limb is changing.
    Type: Application
    Filed: July 27, 2009
    Publication date: February 11, 2010
    Applicant: University of Washington
    Inventors: Joan E. Sanders, Timothy R. Myers, Daniel S. Harrison, Katheryn J. Allyn, Ellen L. Lee, Daniel C. Abrahamson, Kirk Beach, Santosh Zachariah
  • Patent number: D973637
    Type: Grant
    Filed: January 12, 2021
    Date of Patent: December 27, 2022
    Assignee: Target Brands, Inc.
    Inventors: Daniel C. Rose, Yousin Bayi Smith, Kent D. Katterheinrich, Tyler J. Abrahamson, Nathan J. Romportl