Granted Patent
Utility
US 4,700,979 · App. 06/920,103
Apparatus for lifting concrete panels
Inventors:
Peter D. Courtois, Robert E. Truitt
Patented Case
View Patent ↗
Granted: Oct 20, 1987
Filed: Oct 16, 1986
Inventors
Peter D. Courtois
Robert E. Truitt
Assignee (at issue)
DAYTON SUPERIOR CORPORATION
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.