Granted Patent
Utility
US 6,414,461 · App. 09/740,897
Scanner that controls stepping motor torque
Inventor:
Te-Chih Chang
Patented Case
View Patent ↗
Granted: Jul 2, 2002
Filed: Dec 21, 2000
Inventor
Te-Chih Chang
Assignee (at issue)
Mustek Systems 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.