Granted Patent
Utility
US 6,512,787 · App. 09/298,623
Digital impairment learning method and system
Inventors:
Chien-Cheng Tung, Di Zhou
Patented Case
View Patent ↗
Granted: Jan 28, 2003
Filed: Apr 23, 1999
Inventors
Chien-Cheng Tung
Di Zhou
Assignee (at issue)
PCTEL, 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.