Granted Patent
Utility
US 5,421,968 · App. 07/590,623
Cathodic protection system for a steel-reinforced concrete structure
Inventors:
John E. Bennett, Gerald R. Pohto, Thomas A. Mitchell
Patented Case
View Patent ↗
Granted: Jun 6, 1995
Filed: Sep 28, 1990
Inventors
John E. Bennett
Gerald R. Pohto
Thomas A. Mitchell
Assignee (at issue)
Eltech Systems 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.