Patents by Inventor Michael Demko

Michael Demko 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).

  • Ground source cooling system
    Patent number: 5509462
    Abstract: The present invention relates to one or more ground tubes connected and channelized to provide a counter-flow heat exchanger with an annular space to permit water injection into the subsurface water table.
    Type: Grant
    Filed: May 16, 1994
    Date of Patent: April 23, 1996
    Assignee: Ground Air, Inc.
    Inventors: Michael Demko, David Blumentritt, Robin Zapalac
  • Nine volt battery safety cap
    Patent number: D852746
    Type: Grant
    Filed: February 21, 2016
    Date of Patent: July 2, 2019
    Inventor: Michael Demko