Granted Patent
Utility
US 6,620,172 · App. 09/347,591
Entraining biological calculi
Inventors:
Stephen P. Dretler, Paul Geragotelis
Patented Case
View Patent ↗
Granted: Sep 16, 2003
Filed: Jul 1, 1999
Inventors
Stephen P. Dretler
Paul Geragotelis
Assignee (at issue)
MedSource Technologies, Inc.
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.