Granted Patent
Utility
US 5,202,860 · App. 07/664,183
Magneto-optic reproducing device using right and left circularly polarized light
Inventors:
Akira Takahashi, Yoshiteru Murakami, Junsaku Nakayima, Kenji Ohta
Patented Case
View Patent ↗
Granted: Apr 13, 1993
Filed: Mar 4, 1991
Inventors
Akira Takahashi
Yoshiteru Murakami
Junsaku Nakayima
Kenji Ohta
Assignee (at issue)
SHARP KABUSHIKI KAISHA
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.