Granted Patent
Utility
US 6,049,428 · App. 08/836,635
Dichroic light polarizers
Inventors:
Ir Gvon Khan, Yuri A. Bobrov, Leonid Y. Ignatov, Elena Y. Shishkina, Pavel I. Lazarev, Alexey V. Kurbatov
Patented Case
View Patent ↗
Granted: Apr 11, 2000
Filed: Aug 4, 1997
Inventors
Ir Gvon Khan
Yuri A. Bobrov
Leonid Y. Ignatov
Elena Y. Shishkina
Pavel I. Lazarev
Alexey V. Kurbatov
Assignee (at issue)
Optiva, Inc.
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.