Granted Patent
Utility
US 4,821,040 · App. 06/945,613
Circular microstrip vehicular rf antenna
Inventors:
Russell W. Johnson, Robert E. Munson
Patented Case
View Patent ↗
Granted: Apr 11, 1989
Filed: Dec 23, 1986
Inventors
Russell W. Johnson
Robert E. Munson
Assignee (at issue)
BALL 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.