Patents by Inventor David Douglas Gillanders

David Douglas Gillanders 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).

  • Low fluid level indicator for hydration bladder
    Patent number: 6990860
    Abstract: A method for indicating the relative fluid level of a personal hydration bladder, and for alerting the user that the bladder has been depleted to a predetermined level or levels. A non-invasive sensor detects changes in the bladder geometry and transmits the information to a indicating unit worn by the user.
    Type: Grant
    Filed: October 28, 2004
    Date of Patent: January 31, 2006
    Inventor: David Douglas Gillanders