Granted Patent
Utility
US 4,403,796 · App. 06/411,616
Expansion joints
Inventors:
Stephen G. Ledbetter, Michael P. Singleton, Thomas J. Johns, James L. Fabian
Patented Case
View Patent ↗
Granted: Sep 13, 1983
Filed: Aug 26, 1982
Inventors
Stephen G. Ledbetter
Michael P. Singleton
Thomas J. Johns
James L. Fabian
Assignee (at issue)
RM Industrial Products Company, 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.