Granted Patent
Utility
US 4,843,706 · App. 07/107,611
Method of installing
Inventors:
Thomas A. Luther, Robert E. Ward, Jr., Joel D. Galliher, William J. Ryan
Patented Case
View Patent ↗
Granted: Jul 4, 1989
Filed: Oct 13, 1987
Inventors
Thomas A. Luther
Robert E. Ward, Jr.
Joel D. Galliher
William J. Ryan
Assignee (at issue)
Warner & Swasey
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.