Patents by Inventor John M. Heffernan

John M. Heffernan 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).

  • Apparatus using a circuit board having a frangible portion apparatus
    Patent number: 5886875
    Abstract: A circuit board (10) has a frangible portion (12) for carrying information relating to the circuitry carried on the circuit board. The information is carried in the form of a label (18) or barcode, and identifies the version of the circuitry so that during manufacturing, and later during repair, the circuit can be correctly identified. The frangible portion is broken from the circuit board, but kept with the circuit board. In one embodiment, an adhesive label retains the frangible portion.
    Type: Grant
    Filed: January 2, 1996
    Date of Patent: March 23, 1999
    Assignee: Motorola, Inc.
    Inventors: William C. Phelps, III, John M. Heffernan, Habib Amirzadeh
  • Refractory tile for open-spaced boiler tubes
    Patent number: 5558045
    Abstract: A refractory tile adapted for protecting boiler tubes from the corrosive and erosive effects of a hot gas stream comprises an elongated ceramic body covering only that side of a boiler tube upon which the hot gas impinges. The tile is hung on the tube with a threaded stud anchored on the tube and a nut threaded on the stud, urging the tile against the tube.
    Type: Grant
    Filed: September 14, 1994
    Date of Patent: September 24, 1996
    Assignees: Wheelabrator Environmental Systems, Inc., The Carborundum Company
    Inventors: Arthur W. Cole, John M. Heffernan