Granted Patent
Utility
US 4,640,484 · App. 06/730,796
Support column with gravity dependent retention means
Inventors:
Lee T. Lamond, Richard D. Staton
Patented Case
View Patent ↗
Granted: Feb 3, 1987
Filed: May 6, 1985
Inventors
Lee T. Lamond
Richard D. Staton
Assignee (at issue)
Fichtel & Sachs 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.