Granted Patent
Utility
US 6,568,484 · App. 10/018,590
Pneumatic piston percussive mechanism with a hollow percussion piston
Inventors:
Wolfgang Schmid, Mirko Lysek, Rudolf Berger
Patented Case
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Granted: May 27, 2003
Filed: Dec 12, 2001
Inventors
Wolfgang Schmid
Mirko Lysek
Rudolf Berger
Assignee (at issue)
Wacker Construction Equipment AG
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.