Granted Patent
Utility
US 4,669,074 · App. 06/641,356
Focusing control circuitry for an optical memory system
Inventors:
Der-Chang Hsieh, Edward V. LaBudde
Patented Case
View Patent ↗
Granted: May 26, 1987
Filed: Aug 15, 1984
Inventors
Der-Chang Hsieh
Edward V. LaBudde
Assignee (at issue)
Burroughs, Inc.
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.