Granted Patent
Utility
US 4,892,710 · App. 07/070,764
Cartridge assembly with multi-purpose closure tubing
Inventors:
Raphael Wong, That T. Ngo
Patented Case
View Patent ↗
Granted: Jan 9, 1990
Filed: Jul 7, 1987
Inventors
Raphael Wong
That T. Ngo
Assignee (at issue)
BioProbe International, 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.