Granted Patent
Utility
US 5,748,581 · App. 08/602,056
Optical head of an optical disc recording/reproducing apparatus having a polygonal prism
Inventor:
Jin Tae Kim
Patented Case
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Granted: May 5, 1998
Filed: Feb 15, 1996
Inventor
Jin Tae Kim
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.