Granted Patent
Utility
US 5,667,839 · App. 08/183,648
Human recombinant collagen in the milk of transgenic animals
Inventor:
Richard A. Berg
Patented Case
View Patent ↗
Granted: Sep 16, 1997
Filed: Jan 18, 1994
Inventor
Richard A. Berg
Assignee (at issue)
COLLAGEN 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.