Granted Patent
Utility
US 4,613,212 · App. 06/700,760
Objective lens for optical disk
Inventor:
Arai Norikazu
Patented Case
View Patent ↗
Granted: Sep 23, 1986
Filed: Feb 12, 1985
Inventor
Arai Norikazu
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.