Granted Patent
Utility
US 4,899,327 · App. 07/052,115
Focus servo loop correction
Inventors:
Keith A. Bates, Russell A. Budd, Millard A. Habegger, Mark L. Rhoades
Patented Case
View Patent ↗
Granted: Feb 6, 1990
Filed: May 4, 1987
Inventors
Keith A. Bates
Russell A. Budd
Millard A. Habegger
Mark L. Rhoades
Assignee (at issue)
International Business Machines 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.