Granted Patent
Utility
US 4,677,436 · App. 06/604,762
Expandable electronic matrix
Inventors:
Christopher M. Burlingame, Thomas J. Perry
Patented Case
View Patent ↗
Granted: Jun 30, 1987
Filed: Apr 27, 1984
Inventors
Christopher M. Burlingame
Thomas J. Perry
Assignee (at issue)
GTE Communication Systems 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.