IP Library › Granted Patent US 5,535,055
Granted Patent Utility
US 5,535,055 · App. 08/197,187

Optical head device and birefringent diffraction grating polarizer and polarizing hologram element used therein

Inventors: Yuzo Ono, Akitomo Oba
Patented Case View Patent ↗
Granted: Jul 9, 1996 Filed: Feb 16, 1994
Inventors
Yuzo Ono
Akitomo Oba
Assignee (at issue)
NEC CORPORATION

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Quick Facts
Patent No.
US 5,535,055
App. No.
08/197,187
Filed
1994-02-16
Granted
1996-07-09
Kind
A