Granted Patent
Utility
US 6,352,004 · App. 09/486,840
Working device with mass balancing at the crank mechanism
Inventor:
Martin Greppmair
Patented Case
View Patent ↗
Granted: Mar 5, 2002
Filed: Mar 1, 2000
Inventor
Martin Greppmair
Assignee (at issue)
Wacker-Werke GmbH & Co. KG
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.