Granted Patent
Utility
US 4,959,322 · App. 07/320,147
Culturing apparatus
Inventor:
Mari Sakai
Patented Case
View Patent ↗
Granted: Sep 25, 1990
Filed: Mar 7, 1989
Inventor
Mari Sakai
Assignee (at issue)
W. L. Gore & Associates, Inc.
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.