Granted Patent
Utility
US 5,003,556 · App. 07/375,036
Squelch circuit
Inventors:
Robert A. Curtis, William C. Mallard, Jr.
Patented Case
View Patent ↗
Granted: Mar 26, 1991
Filed: Jun 30, 1989
Inventors
Robert A. Curtis
William C. Mallard, Jr.
Assignee (at issue)
Digital Equipment 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.