Granted Patent
Utility
US 4,458,288 · App. 06/383,385
Electrical protective devices
Inventors:
John L. Chapman, Jr., Thomas A. La Valle, Peter S. Nelson
Patented Case
View Patent ↗
Granted: Jul 3, 1984
Filed: May 28, 1982
Inventors
John L. Chapman, Jr.
Thomas A. La Valle
Peter S. Nelson
Assignee (at issue)
AT&T Technologies Incorporated
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.