Granted Patent
Utility
US 4,299,511 · App. 06/134,560
Connector and imperforate reinforcement plates in combination
Inventor:
Harlan J. Demers
Patented Case
View Patent ↗
Granted: Nov 10, 1981
Filed: Mar 27, 1980
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.