Patents by Inventor Michael T. Callas

Michael T. Callas 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).

  • Combined floor mat and antennas for an electronic article surveillance system
    Patent number: 9312598
    Abstract: An electronic article surveillance system has transmitter and receiver antennas secured to the bottom of a floor mat to provide an interrogation zone above the mat and an electronic control unit operable to energize the transmitter antenna to provide an electromagnetic field in the interrogation zone and sense electric signals from the receiver antenna to produce an alarm indicating the presence of a tag in the interrogation zone.
    Type: Grant
    Filed: January 8, 2014
    Date of Patent: April 12, 2016
    Assignee: CALLAS ENTERPRISES, LLC
    Inventor: Michael T. Callas
  • Graphic floor mat and method of making mat
    Patent number: 8859073
    Abstract: A floor mat has a cavity accommodating an insert supporting a releasable sheet member. An adhesive releasably attaches the sheet member to the insert to allow the sheet member to be removed from the mat and replaced with another sheet member. The sheet member has visual indicia providing persons with information. Signal transmitter and receiver antennas of an electronic article surveillance system are located within the floor mat.
    Type: Grant
    Filed: March 1, 2011
    Date of Patent: October 14, 2014
    Assignee: Callas Enterprises, LLC
    Inventor: Michael T. Callas
  • Method of making mat
    Patent number: 6258202
    Abstract: An entrance mat has a polypropylene greige fiber pad with a trimmed outer peripheral edge and a backing of non-skid plastic material. The backing has longitudinal treads having high friction and tacky properties which prevent creep and folding of the pad on a floor. An edge has a non-skid web secured with an adhesive to the backing and a lip extended over the adhesively secured to the trimmed outer peripheral edge.
    Type: Grant
    Filed: March 6, 2000
    Date of Patent: July 10, 2001
    Inventor: Michael T. Callas
  • Mat and method of making mat
    Patent number: 6093469
    Abstract: An entrance mat has a polypropylene greige fiber pad with a trimmed outer peripheral edge and a backing of non-skid plastic material. The backing has longitudinal treads having high friction and tacky properties which prevent creep and folding of the pad on a floor. An edge has a non-skid web secured with an adhesive to the backing and a lip extended over the adhesively secured to the trimmed outer peripheral edge.
    Type: Grant
    Filed: August 25, 1998
    Date of Patent: July 25, 2000
    Inventor: Michael T. Callas
  • Communication apparatus
    Patent number: 4772869
    Abstract: A portable information marker having a tetrahedron stand joined to a base supported on a surface. The stand has a top wall releasably accommodating an information unit. The information unit and top wall have interlocking slot and ear structures allowing the information unit to be removed from the top wall and replaced with an alternate information unit. The alternate information unit can be a flashing light unit.
    Type: Grant
    Filed: January 19, 1988
    Date of Patent: September 20, 1988
    Assignee: Lamba Systems, Inc.
    Inventors: Nick G. Grammas, Michael T. Callas
  • Floor mat border
    Patent number: D439462
    Type: Grant
    Filed: May 29, 1998
    Date of Patent: March 27, 2001
    Inventor: Michael T. Callas
  • Combined road marker and lock-in sign
    Patent number: D277738
    Type: Grant
    Filed: March 14, 1983
    Date of Patent: February 26, 1985
    Assignee: Lamba Systems, Inc.
    Inventors: Nick G. Grammas, Michael T. Callas
  • Combined road marker and flashing light
    Patent number: D277739
    Type: Grant
    Filed: March 14, 1983
    Date of Patent: February 26, 1985
    Assignee: Lamba Systems, Inc.
    Inventors: Nick G. Grammas, Michael T. Callas
  • EAS antenna
    Patent number: D589500
    Type: Grant
    Filed: November 2, 2006
    Date of Patent: March 31, 2009
    Assignee: First Impression Systems, LLC
    Inventor: Michael T. Callas
  • EAS antenna
    Patent number: D624059
    Type: Grant
    Filed: March 27, 2009
    Date of Patent: September 21, 2010
    Assignee: First Impression Systems, LLC
    Inventor: Michael T. Callas
  • Gripper for installing and removing a sign holder
    Patent number: D399397
    Type: Grant
    Filed: January 27, 1997
    Date of Patent: October 13, 1998
    Inventor: Michael T. Callas
  • Combined mat and EAS antenna
    Patent number: D715274
    Type: Grant
    Filed: February 16, 2011
    Date of Patent: October 14, 2014
    Assignee: Callas Enterprises, LLC
    Inventor: Michael T. Callas
  • Combined floor mat and EAS antenna
    Patent number: D749062
    Type: Grant
    Filed: January 2, 2013
    Date of Patent: February 9, 2016
    Inventor: Michael T. Callas
  • Combined mat and eas antenna
    Patent number: D749063
    Type: Grant
    Filed: August 11, 2014
    Date of Patent: February 9, 2016
    Assignee: CALLAS ENTERPRISES LLC
    Inventor: Michael T. Callas