Granted Patent
Utility
US 5,041,838 · App. 07/489,416
Cellular telephone antenna
Inventors:
William J. Liimatainen, Kevin Thill
Patented Case
View Patent ↗
Granted: Aug 20, 1991
Filed: Mar 6, 1990
Inventors
William J. Liimatainen
Kevin Thill
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.