Patents by Inventor Marvin D. Blum

Marvin D. Blum 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).

  • Display case
    Patent number: D300394
    Type: Grant
    Filed: June 27, 1986
    Date of Patent: March 28, 1989
    Assignee: American Design Group, Inc.
    Inventors: Marvin D. Blum, Robert I. Rubin
  • Display case
    Patent number: D321800
    Type: Grant
    Filed: February 9, 1989
    Date of Patent: November 26, 1991
    Assignee: American Design Group, Inc.
    Inventor: Marvin D. Blum
  • Jewelry display stand
    Patent number: D322368
    Type: Grant
    Filed: January 23, 1989
    Date of Patent: December 17, 1991
    Assignee: American Design Group, Inc.
    Inventor: Marvin D. Blum
  • Combined earring and jacket
    Patent number: D390151
    Type: Grant
    Filed: June 17, 1996
    Date of Patent: February 3, 1998
    Assignee: American Design Group, Inc.
    Inventors: Judy H. Blum, Marvin D. Blum