Granted Patent
Utility
US 6,315,876 · App. 08/233,461
Cathodic protection system
Inventors:
James E. Delahoyde, William P. Carlson
Patented Case
View Patent ↗
Granted: Nov 13, 2001
Filed: Apr 26, 1994
Inventors
James E. Delahoyde
William P. Carlson
Assignee (at issue)
Corrpro Companies, 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.