Granted Patent
Utility
US 4,852,978 · App. 07/065,918
Liquid crystal cell utilizing a ferroelectric liquid crystal having a natural pitch length is no longer than the longest wavelength of visible light
Inventors:
Anthony Bernard Davey, Matthew Bone
Patented Case
View Patent ↗
Granted: Aug 1, 1989
Filed: Jun 23, 1987
Inventors
Anthony Bernard Davey
Matthew Bone
Assignee (at issue)
STC PLC
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.