Granted Patent
Utility
US 6,343,497 · App. 09/756,781
Method of manufacturing a speed gear and an apparatus for manufacturing a speed gear
Inventor:
Heiichi Hasegawa
Patented Case
View Patent ↗
Granted: Feb 5, 2002
Filed: Jan 10, 2001
Inventor
Heiichi Hasegawa
Assignee (at issue)
Metal Art, 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.