Granted Patent
Utility
US 4,936,313 · App. 07/273,406
Power tool for excising a bone or cartilage biopsy
Inventors:
Rolf Burkhardt, Raymund A. Meier
Patented Case
View Patent ↗
Granted: Jun 26, 1990
Filed: Nov 18, 1988
Inventors
Rolf Burkhardt
Raymund A. Meier
Assignee (at issue)
INSTITUT STRAUMANN 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.