Granted Patent
Utility
US 4,819,196 · App. 07/049,862
Digital-based phase control system
Inventors:
Martin A. Lilley, Jan S. Wesolowski
Patented Case
View Patent ↗
Granted: Apr 4, 1989
Filed: Feb 27, 1987
Inventors
Martin A. Lilley
Jan S. Wesolowski
Assignee (at issue)
Ampex 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.