Granted Patent
Utility
US 4,716,622 · App. 06/833,168
Concealed self-closing hinge
Inventor:
William DeBruyn
Patented Case
View Patent ↗
Granted: Jan 5, 1988
Filed: Feb 27, 1986
Inventor
William DeBruyn
Assignee (at issue)
ARTERICA 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.