Granted Patent
Utility
US 4,740,944 · App. 07/052,773
Optical disk phase lock loop with comb filter
Inventor:
Johannes J. Verboom
Patented Case
View Patent ↗
Granted: Apr 26, 1988
Filed: May 21, 1987
Inventor
Johannes J. Verboom
Assignee (at issue)
Laser Magnetic Storage International Company
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.