Granted Patent
Utility
US 4,896,994 · App. 07/272,529
Highway expansion joint strip seal
Inventor:
Howard R. Brown
Patented Case
View Patent ↗
Granted: Jan 30, 1990
Filed: Nov 17, 1988
Inventor
Howard R. Brown
Assignee (at issue)
The D.S. Brown Company
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.