Granted Patent
Utility
US 4,509,166 · App. 06/503,421
PCM Communication system and method of operation
Inventor:
Joachim Simon
Patented Case
View Patent ↗
Granted: Apr 2, 1985
Filed: Nov 4, 1983
Inventor
Joachim Simon
Assignee (at issue)
Nixdorf Computer AG
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.