Granted Patent
Utility
US 4,398,761 · App. 06/289,712
Device for lifting and tilting concrete panels
Inventors:
David W. Hanson, Richard C. Nash, Richard R. Koehn
Patented Case
View Patent ↗
Granted: Aug 16, 1983
Filed: Aug 3, 1981
Inventors
David W. Hanson
Richard C. Nash
Richard R. Koehn
Assignee (at issue)
FABCON, 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.