Granted Patent
Utility
US 4,179,181 · App. 05/892,585
Infrared reflecting articles
Inventor:
Leei Chang
Patented Case
View Patent ↗
Granted: Dec 18, 1979
Filed: Apr 3, 1978
Inventor
Leei Chang
Assignee (at issue)
American Optical 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.