Patents by Inventor James Leroy Caldwell

James Leroy Caldwell 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).

  • Lift anchor for concrete panel
    Publication number: 20030208969
    Abstract: An anchor for use in a concrete panel that has a shank with four sides forming a substantially square longitudinal cross-section. One end of the shank is connected to a foot and is embedable in the concrete panel. An opposite end of the shank is connected to a head and is locatable in a recess in the concrete panel.
    Type: Application
    Filed: May 10, 2002
    Publication date: November 13, 2003
    Applicant: Dayton Superior Corporation
    Inventors: Harry B. Lancelot, Sidney E. Francies, James Leroy Caldwell