Granted Patent
Utility
US 6,052,443 · App. 09/166,739
Alphanumeric message composing method using telephone keypad
Inventors:
Surendra Perera, Lu Chang, Jian-Cheng Huang, Robert J. Schwendeman
Patented Case
View Patent ↗
Granted: Apr 18, 2000
Filed: Oct 5, 1998
Inventors
Surendra Perera
Lu Chang
Jian-Cheng Huang
Robert J. Schwendeman
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.