Granted Patent
Utility
US 4,793,363 · App. 06/906,358
Biopsy needle
Inventors:
Ronald W. Ausherman, Richard A. Burkholder
Patented Case
View Patent ↗
Granted: Dec 27, 1988
Filed: Sep 11, 1986
Inventors
Ronald W. Ausherman
Richard A. Burkholder
Assignee (at issue)
Sherwood Medical Company
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.