Granted Patent
Utility
US 5,511,556 · App. 08/225,594
Needle core biopsy instrument
Inventor:
Stephen DeSantis
Patented Case
View Patent ↗
Granted: Apr 30, 1996
Filed: Apr 11, 1994
Inventor
Stephen DeSantis
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.