Patents by Inventor Leroy F. Radtke, Jr.

Leroy F. Radtke, Jr. 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).

  • Small electric fan
    Patent number: D349570
    Type: Grant
    Filed: July 20, 1993
    Date of Patent: August 9, 1994
    Assignee: Circulair, Inc.
    Inventor: Leroy F. Radtke, Jr.
  • Electric fan
    Patent number: D352775
    Type: Grant
    Filed: November 12, 1992
    Date of Patent: November 22, 1994
    Assignee: Circulair, Inc.
    Inventor: Leroy F. Radtke, Jr.
  • Electric fan heater
    Patent number: D372523
    Type: Grant
    Filed: July 20, 1993
    Date of Patent: August 6, 1996
    Assignee: Circulair, Inc.
    Inventor: Leroy F. Radtke, Jr.