Granted Patent
Utility
US 4,383,455 · App. 06/198,132
Arm with gravity-balancing function
Inventors:
Goro Tuda, Osamu Mizuguchi
Patented Case
View Patent ↗
Granted: May 17, 1983
Filed: Oct 21, 1980
Inventors
Goro Tuda
Osamu Mizuguchi
Assignee (at issue)
KOBE STEEL, LTD.
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.