Granted Patent
Utility
US 4,775,227 · App. 06/870,033
Electrochromic device
Inventor:
Jack Silver
Patented Case
View Patent ↗
Granted: Oct 4, 1988
Filed: Jun 3, 1986
Inventor
Jack Silver
Assignee (at issue)
NATIONAL RESEARCH DEVELOPMENT 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.