Granted Patent
Utility
US 6,389,921 · App. 09/634,993
Wrist mechanism of industrial robot
Inventor:
Minoru Nada
Patented Case
View Patent ↗
Granted: May 21, 2002
Filed: Aug 8, 2000
Inventor
Minoru Nada
Assignee (at issue)
NACHI-FUJIKOSHI CORP.
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.