Patents by Inventor Robert J. Engberg

Robert J. Engberg 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).

  • Protective bumper
    Patent number: D378054
    Type: Grant
    Filed: December 12, 1995
    Date of Patent: February 18, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Robert J. Engberg
  • Sheet member with a plurality of protective bumpers
    Patent number: D382354
    Type: Grant
    Filed: December 12, 1995
    Date of Patent: August 12, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Robert J. Engberg
  • Sheet member with a plurality of protective bumpers
    Patent number: D383311
    Type: Grant
    Filed: December 12, 1995
    Date of Patent: September 9, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Robert J. Engberg
  • Hex-shaped protective bumpers
    Patent number: D407303
    Type: Grant
    Filed: January 19, 1996
    Date of Patent: March 30, 1999
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Robert J. Engberg
  • Sheet comprising a plurality of hex-shaped protective bumpers
    Patent number: D416476
    Type: Grant
    Filed: April 10, 1996
    Date of Patent: November 16, 1999
    Assignee: 3M Innovative Properties Company
    Inventor: Robert J. Engberg