Granted Patent
Utility
US 5,162,116 · App. 07/794,647
Intra-ruminal device for delivering drugs
Inventor:
Michael T. Shepherd
Patented Case
View Patent ↗
Granted: Nov 10, 1992
Filed: Nov 18, 1991
Inventor
Michael T. Shepherd
Assignee (at issue)
Coopers Animal Health 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.