Granted Patent
Utility
US 4,763,714 · App. 07/021,586
Dual wall partition
Inventor:
Charles E. Williams
Patented Case
View Patent ↗
Granted: Aug 16, 1988
Filed: Mar 2, 1987
Inventor
Charles E. Williams
Assignee (at issue)
Hough Manufacturing Corporation
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.