Granted Patent
Utility
US 4,641,296 · App. 06/603,655
Optical head for information recording apparatus
Inventors:
Katsumi Mizunoe, Junichi Yanai, Kiyoshi Kimoto
Patented Case
View Patent ↗
Granted: Feb 3, 1987
Filed: Apr 25, 1984
Inventors
Katsumi Mizunoe
Junichi Yanai
Kiyoshi Kimoto
Assignee (at issue)
Nippon Kogaku K.K.
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.