Granted Patent
Utility
US 4,286,267 · App. 06/023,308
Directional antenna system with electronically controllable sweep of the beam direction
Inventor:
Theodor Schwierz
Patented Case
View Patent ↗
Granted: Aug 25, 1981
Filed: Mar 23, 1979
Inventor
Theodor Schwierz
Assignee (at issue)
Siemens Aktiengesellschaft
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.