Granted Patent
Utility
US 5,785,522 · App. 08/338,628
Method of treating surgical drill, surgical drill and use of surgical drill
Inventors:
Nils Gustav Bergstrom, Anders Holmen
Patented Case
View Patent ↗
Granted: Jul 28, 1998
Filed: Feb 7, 1995
Inventors
Nils Gustav Bergstrom
Anders Holmen
Assignee (at issue)
ASTRA CO., LTD.
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.