Patents by Inventor John G. FitzGerald

John G. FitzGerald 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).

  • Electronic article surveillance markers for direct application to optically recorded media
    Patent number: 6097291
    Abstract: An Electronic Article Surveillance (EAS) marker is adapted for direct application to optically recorded media such as compact disks, CD-ROM's, laser disks, digital video disks, and the like. The marker includes a support sheet and one or more marker elements which are positioned such that the mass distribution of the marker is symmetrically disposed about the center of the marker. This ensures that when the marker is properly positioned on the optically recorded media, the marker does not adversely affect the mechanical balance of the media.
    Type: Grant
    Filed: May 25, 1999
    Date of Patent: August 1, 2000
    Assignee: 3M Innovative Properties Company
    Inventors: Ching-Long Tsai, Chester Piotrowski, Rita M. Lunderville, Norman L. Koning, John G. Fitzgerald
  • Electronic article surveillance markers for direct application to optically recorded media
    Patent number: 5939985
    Abstract: An Electronic Article Surveillance (EAS) marker is adapted for direct application to optically recorded media such as compact disks, CD-ROM's, laser disks, digital video disks, and the like. The marker includes a support sheet and one or more marker elements which are positioned such that the mass distribution of the marker is symmetrically disposed about the center of the marker. This ensures that when the marker is properly positioned on the optically recorded media, the marker does not adversely affect the mechanical balance of the media.
    Type: Grant
    Filed: September 11, 1998
    Date of Patent: August 17, 1999
    Assignee: Innovative Properties Company
    Inventors: Ching-Long Tsai, Chester Piotrowski, Rita M. Lunderville, Norman L. Koning, John G. Fitzgerald
  • Electronic article surveillance markers for direct application to optically recorded media
    Patent number: 5825292
    Abstract: An Electronic Article Surveillance (EAS) marker is adapted for direct application to optically recorded media such as compact disks, CD-ROM's, laser disks, digital video disks, and the like. The marker includes a support sheet and one or more marker elements which are positioned such that the mass distribution of the marker is symmetrically disposed about the center of the marker. This ensures that when the marker is properly positioned on the optically recorded media, the marker does not adversely affect the mechanical balance of the media.
    Type: Grant
    Filed: July 3, 1997
    Date of Patent: October 20, 1998
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Ching-Long Tsai, Norman L. Koning, John G. Fitzgerald, Chester Piotrowski, Rita M. Lunderville
  • Electronic article surveillance markers for direct application to optically recorded media
    Patent number: 5699047
    Abstract: An Electronic Article Surveillance (EAS) marker is adapted for direct application to optically recorded media such as compact disks, CD-ROM's, laser disks, digital video disks, and the like. The marker includes a support sheet and one or more marker elements which are positioned such that the mass distribution of the marker is symmetrically disposed about the center of the marker. This ensures that when the marker is properly positioned on the optically recorded media, the marker does not adversely affect the mechanical balance of the media.
    Type: Grant
    Filed: January 19, 1996
    Date of Patent: December 16, 1997
    Assignee: Minnesota Mining and Manufacturing Co.
    Inventors: Ching-Long Tsai, Chester Piotrowski, Rita M. Lunderville, Norman L. Koning, John G. Fitzgerald
  • Low pressure non-fragmenting rupture disks
    Patent number: 5002085
    Abstract: Low pressure, non-fragmenting rupture disks and assemblies including such disks are provided. The rupture disks are each basically comprises of a non-metallic rupture member having one or more lines of weakness formed by indentations therein which define blow-out portions in the rupture member. The blow-out portions are moved outwardly upon rupture of the rupture member along the lines of weakness, but remain attached to the rupture member by non-weakened portions thereof. A non-metallic reinforcing member is attached to the rupture member for preventing tearing of the non-weakened portions of the rupture member.
    Type: Grant
    Filed: February 12, 1990
    Date of Patent: March 26, 1991
    Assignee: BS&B Safety Systems, Inc.
    Inventor: John G. FitzGerald