Granted Patent
Utility
US 4,317,641 · App. 06/146,436
Locking connection for supporting grid systems
Inventor:
Gale E. Sauer
Patented Case
View Patent ↗
Granted: Mar 2, 1982
Filed: May 5, 1980
Inventor
Gale E. Sauer
Assignee (at issue)
Roblin Industries, 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.