Patents by Inventor Frederick E. Markus

Frederick E. Markus 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).

  • Shelving unit
    Patent number: D263534
    Type: Grant
    Filed: September 20, 1979
    Date of Patent: March 30, 1982
    Inventor: Frederick E. Markus
  • Shelving unit
    Patent number: D263913
    Type: Grant
    Filed: September 20, 1979
    Date of Patent: April 20, 1982
    Inventor: Frederick E. Markus
  • Shelving unit
    Patent number: D264033
    Type: Grant
    Filed: September 20, 1979
    Date of Patent: April 27, 1982
    Inventor: Frederick E. Markus
  • Shelving unit
    Patent number: D264659
    Type: Grant
    Filed: September 20, 1979
    Date of Patent: June 1, 1982
    Inventor: Frederick E. Markus
  • Shelving unit
    Patent number: D265958
    Type: Grant
    Filed: September 20, 1979
    Date of Patent: August 31, 1982
    Inventor: Frederick E. Markus