Granted Patent
Utility
US 4,815,072 · App. 06/845,663
Switching arrangements for digital telecommunications exchange systems
Inventors:
Martin J. Linda, Kevin Griffin
Patented Case
View Patent ↗
Granted: Mar 21, 1989
Filed: Mar 28, 1986
Inventors
Martin J. Linda
Kevin Griffin
Assignee (at issue)
Plessey Overseas Limited
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.