Granted Patent
Utility
US 5,157,290 · App. 07/664,907
Phase detector
Inventor:
Philip S. Crosby
Patented Case
View Patent ↗
Granted: Oct 20, 1992
Filed: Mar 5, 1991
Inventor
Philip S. Crosby
Assignee (at issue)
Tektronix, 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.