Granted Patent
Utility
US 4,817,600 · App. 07/053,354
Implantable filter
Inventors:
James K. Herms, Gaillard R. Nolan, Jonathan R. McGrath, Mark J Tolkoff
Patented Case
View Patent ↗
Granted: Apr 4, 1989
Filed: May 22, 1987
Inventors
James K. Herms
Gaillard R. Nolan
Jonathan R. McGrath
Mark J Tolkoff
Assignee (at issue)
Medi-Tech 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.