Granted Patent
Utility
US 6,531,992 · App. 09/813,365
Back frame assembly
Inventors:
Robert G. Ehrenberg, Michael Sorensen
Patented Case
View Patent ↗
Granted: Mar 11, 2003
Filed: Mar 20, 2001
Inventors
Robert G. Ehrenberg
Michael Sorensen
Assignee (at issue)
NeTune Communications, 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.