Granted Patent
Utility
US 4,753,879 · App. 06/644,537
Modified tissue plasminogen activators
Inventors:
Joseph J. Rosa, Margaret D. Rosa
Patented Case
View Patent ↗
Granted: Jun 28, 1988
Filed: Aug 27, 1984
Inventors
Joseph J. Rosa
Margaret D. Rosa
Assignee (at issue)
Biogen, N.V.
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.