Granted Patent
Utility
US 4,748,019 · App. 06/789,960
Vaccine for swine dysentery
Inventor:
Richard J. Lysons
Patented Case
View Patent ↗
Granted: May 31, 1988
Filed: Oct 9, 1985
Inventor
Richard J. Lysons
Assignee (at issue)
NATIONAL RESEARCH DEVELOPMENT CORPORATION
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.