Patents by Inventor Michael A. Isban

Michael A. Isban 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).

  • Hollow door construction using an improved void filler
    Patent number: 5167105
    Abstract: An improved hollow paneled door construction using an improved void filler that is expandable and which has components of a specific thickness except for relieved sections of reduced thickness to overlie the panels between the doorskins.
    Type: Grant
    Filed: April 2, 1991
    Date of Patent: December 1, 1992
    Assignee: American Containers, Inc.
    Inventors: Leonard D. Isban, Michael A. Isban