Granted Patent
Utility
US 4,982,184 · App. 07/293,039
Electrocrystallochromic display and element
Inventor:
John Kirkwood
Patented Case
View Patent ↗
Granted: Jan 1, 1991
Filed: Jan 3, 1989
Inventor
John Kirkwood
Assignee (at issue)
General Electric 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.