Granted Patent
Utility
US 4,497,539 · App. 06/432,989
Antireflection optical coating
Inventors:
Kunio Sakurai, Hiroshi Ito, Takashi Nozaki
Patented Case
View Patent ↗
Granted: Feb 5, 1985
Filed: Oct 6, 1982
Inventors
Kunio Sakurai
Hiroshi Ito
Takashi Nozaki
Assignee (at issue)
Konishiroku Photo Industry Co., Ltd.
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.