Granted Patent
Utility
US 4,250,350 · App. 06/078,261
Expansion joint with interior grounding continuity bond
Inventor:
Robert F. Polimine
Patented Case
View Patent ↗
Granted: Feb 10, 1981
Filed: Sep 24, 1979
Inventor
Robert F. Polimine
Assignee (at issue)
Federal Signal Corporation
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.