Granted Patent
Utility
US 5,286,418 · App. 07/725,641
Polarizing film
Inventors:
Katsuji Nakamura, Junichi Fujio, Shin Hosonuma, Masakatsu Nakatsuka, Tsutomu Nishizawa
Patented Case
View Patent ↗
Granted: Feb 15, 1994
Filed: Jul 3, 1991
Inventors
Katsuji Nakamura
Junichi Fujio
Shin Hosonuma
Masakatsu Nakatsuka
Tsutomu Nishizawa
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
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.