Granted Patent
Utility
US 4,699,540 · App. 06/848,926
Expansion joint
Inventors:
Robert M. Gibbon, J. William Houtz
Patented Case
View Patent ↗
Granted: Oct 13, 1987
Filed: Apr 7, 1986
Inventors
Robert M. Gibbon
J. William Houtz
Assignee (at issue)
JMK International, 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.