Granted Patent
Utility
US 4,531,324 · App. 06/540,020
Plant tissue culture device
Inventors:
Ning-Sun Yang, Alan Paau
Patented Case
View Patent ↗
Granted: Jul 30, 1985
Filed: Oct 7, 1983
Inventors
Ning-Sun Yang
Alan Paau
Assignee (at issue)
Agracetus, 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.