Granted Patent
Utility
US 6,237,700 · App. 09/622,546
Pneumatic impact mechanism with a drive piston having a reduced wall thickness
Inventors:
Rudolf Berger, Wolfgang Schmid
Patented Case
View Patent ↗
Granted: May 29, 2001
Filed: Aug 16, 2000
Inventors
Rudolf Berger
Wolfgang Schmid
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.