Granted Patent
Utility
US 4,420,520 · App. 06/365,481
Area coated paint mask and method
Inventors:
Wallace R. Jones, Paul A. Krieger, John F. Haas
Patented Case
View Patent ↗
Granted: Dec 13, 1983
Filed: Apr 5, 1982
Inventors
Wallace R. Jones
Paul A. Krieger
John F. Haas
Assignee (at issue)
The Excello Specialty 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.