Granted Patent
Utility
US 4,892,831 · App. 07/286,248
Inoculating device
Inventor:
Johnson N. S. Wong
Patented Case
View Patent ↗
Granted: Jan 9, 1990
Filed: Dec 19, 1988
Inventor
Johnson N. S. Wong
Assignee (at issue)
Evergreen Industries, 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.