Granted Patent
Utility
US 5,301,045 · App. 07/961,299
Helical liquid crystalline element which produces linear polarized light
Inventors:
Alfred Miller, Franz-Heinrich Kreuzer, Horst Leigeber, Christoph Brauchle, Andreas Petri
Patented Case
View Patent ↗
Granted: Apr 5, 1994
Filed: Oct 15, 1992
Inventors
Alfred Miller
Franz-Heinrich Kreuzer
Horst Leigeber
Christoph Brauchle
Andreas Petri
Assignee (at issue)
Consortium für elektrochemische Industrie GmbH
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.