Granted Patent
Utility
US 4,253,280 · App. 06/024,222
Method of labelling directional characteristics of an article having two opposite major surfaces
Inventors:
Loring E. Du Bois, Lawrence D. Simpson
Patented Case
View Patent ↗
Granted: Mar 3, 1981
Filed: Mar 26, 1979
Inventors
Loring E. Du Bois
Lawrence D. Simpson
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.