Granted Patent
Utility
US 6,547,441 · App. 10/010,335
Cam mechanism
Inventor:
Heizaburo Kato
Patented Case
View Patent ↗
Granted: Apr 15, 2003
Filed: Oct 22, 2001
Inventor
Heizaburo Kato
Assignee (at issue)
Sankyo Manufacturing Co., 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.