Granted Patent
Utility
US 4,568,881 · App. 06/491,001
Phase comparator and data separator
Inventor:
Anna Kostrov
Patented Case
View Patent ↗
Granted: Feb 4, 1986
Filed: May 3, 1983
Inventor
Anna Kostrov
Assignee (at issue)
Magnetic Peripherals, 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.