Granted Patent
Utility
US 4,598,398 · App. 06/623,853
Test apparatus for PCM/FDM transmultiplexer
Inventor:
Eric L. Doggett
Patented Case
View Patent ↗
Granted: Jul 1, 1986
Filed: Jun 22, 1984
Inventor
Eric L. Doggett
Assignee (at issue)
ITT 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.