Granted Patent
Utility
US 4,583,217 · App. 06/520,383
Method of access control in a communication system using orthogonal functions
Inventor:
Ludwig Kittel
Patented Case
View Patent ↗
Granted: Apr 15, 1986
Filed: Aug 4, 1983
Inventor
Ludwig Kittel
Assignee (at issue)
U.S. Philips 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.