Granted Patent
Utility
US 4,301,192 · App. 06/155,246
Method for coating thru holes in a printed circuit substrate
Inventors:
George J. Plichta, Thomas E. Unger
Patented Case
View Patent ↗
Granted: Nov 17, 1981
Filed: Jun 2, 1980
Inventors
George J. Plichta
Thomas E. Unger
Assignee (at issue)
Western Electric Company, 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.