Granted Patent
Utility
US 5,097,457 · App. 07/307,924
Optical recording system having a rotating optical element provided therein
Inventors:
Andrew P. Keens, Anthony P. Lang
Patented Case
View Patent ↗
Granted: Mar 17, 1992
Filed: Feb 9, 1989
Inventors
Andrew P. Keens
Anthony P. Lang
Assignee (at issue)
Thorn EMI plc
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.