Granted Patent
Utility
US 5,128,849 · App. 07/449,005
Optical disk structures for electron trapping optical memory media
Inventors:
Emerie I. Podraczky, William R. Ziegler
Patented Case
View Patent ↗
Granted: Jul 7, 1992
Filed: Dec 12, 1989
Inventors
Emerie I. Podraczky
William R. Ziegler
Assignee (at issue)
OPTEX CO., LTD.
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.