Granted Patent
Utility
US 6,438,381 · App. 09/590,215
Method and apparatus for location determination of a cellular telephone
Inventors:
William P. Alberth, Jr., Michael D. Kotzin
Patented Case
View Patent ↗
Granted: Aug 20, 2002
Filed: Jun 8, 2000
Inventors
William P. Alberth, Jr.
Michael D. Kotzin
Assignee (at issue)
Motorola, Inc.
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.