Granted Patent
Utility
US 5,049,871 · App. 07/524,682
Loop communication system
Inventors:
Donald P. Sturgis, Michael Wolpert
Patented Case
View Patent ↗
Granted: Sep 17, 1991
Filed: May 16, 1990
Inventors
Donald P. Sturgis
Michael Wolpert
Assignee (at issue)
American Magnetics, 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.