Granted Patent
Utility
US 4,549,838 · App. 06/206,866
Method of manufacturing a connector plate, connector plate and machine for manufacturing connector plate
Inventor:
Robert W. Birckhead
Patented Case
View Patent ↗
Granted: Oct 29, 1985
Filed: Nov 14, 1980
Inventor
Robert W. Birckhead
Assignee (at issue)
Alpine Engineered Products, 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.