Granted Patent
Utility
US 4,742,663 · App. 06/261,593
Concealed load distribution means for wooden beams
Inventor:
Harlan J. Demers
Patented Case
View Patent ↗
Granted: May 10, 1988
Filed: May 7, 1981
Inventor
Harlan J. Demers
Assignee (at issue)
KOPPERS, 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.