Granted Patent
Utility
US 4,749,049 · App. 06/837,538
Hand-guided impact hammer and hammer drill
Inventor:
Martin Greppmair
Patented Case
View Patent ↗
Granted: Jun 7, 1988
Filed: Mar 7, 1986
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.