Granted Patent
Utility
US 5,423,824 · App. 08/037,114
Method of accessing hard tissue
Inventors:
Dan Akerfeldt, Gunnar Astrom, Håkan Ahlström
Patented Case
View Patent ↗
Granted: Jun 13, 1995
Filed: Mar 23, 1993
Inventors
Dan Akerfeldt
Gunnar Astrom
Håkan Ahlström
Assignee (at issue)
Radi Medical Systems AB
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.