Patents by Inventor Arnold C. Siedschlag

Arnold C. Siedschlag 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).

  • Sculptured ventilating concrete block
    Patent number: D264996
    Type: Grant
    Filed: April 11, 1980
    Date of Patent: June 15, 1982
    Inventor: Arnold C. Siedschlag
  • Ventilating concrete block
    Patent number: D264997
    Type: Grant
    Filed: April 11, 1980
    Date of Patent: June 15, 1982
    Assignee: Warren F. B. Lindsley
    Inventor: Arnold C. Siedschlag
  • Louvered concrete block
    Patent number: D264998
    Type: Grant
    Filed: April 11, 1980
    Date of Patent: June 15, 1982
    Assignee: Warren F. B. Lindsley
    Inventor: Arnold C. Siedschlag