Granted Patent
Utility
US 6,148,930 · App. 09/331,941
Percussion drill and/or jack hammer with handle spring-buffered against the hammer housing
Inventors:
Rudolf Berger, Thomas Maurer
Patented Case
View Patent ↗
Granted: Nov 21, 2000
Filed: Jun 25, 1999
Inventors
Rudolf Berger
Thomas Maurer
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.