Granted Patent
Utility
US 4,904,479 · App. 07/004,189
Drug delivery system
Inventor:
Lisbeth Illum
Patented Case
View Patent ↗
Granted: Feb 27, 1990
Filed: Jan 15, 1987
Inventor
Lisbeth Illum
Assignee (at issue)
Danbiosyst UK Limited
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.