Granted Patent
Utility
US 4,286,266 · App. 05/968,958
Display device
Inventors:
Maarten de Zwart, Johannes L. A. M. Heldens
Patented Case
View Patent ↗
Granted: Aug 25, 1981
Filed: Dec 13, 1978
Inventors
Maarten de Zwart
Johannes L. A. M. Heldens
Assignee (at issue)
U.S. Philips 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.