Granted Patent
Utility
US 5,570,334 · App. 08/348,941
Optical pickup with a double refraction polarizing plate to split light beams into two polarized beams
Inventor:
Seongmin Kim
Patented Case
View Patent ↗
Granted: Oct 29, 1996
Filed: Nov 25, 1994
Inventor
Seongmin Kim
Assignee (at issue)
Daewoo Electronics Corporation
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.