Granted Patent
Utility
US 5,014,473 · App. 07/481,870
Apparatus and method for lifting tilt-up wall constructions
Inventors:
David L. Kelly, Steven A. Bennetts
Patented Case
View Patent ↗
Granted: May 14, 1991
Filed: Feb 20, 1990
Inventors
David L. Kelly
Steven A. Bennetts
Assignee (at issue)
Burke, Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.