Granted Patent
Utility
US 4,890,792 · App. 07/181,143
Nozzle assembly
Inventors:
Douglas S. Martin, Joseph W. J. Maas
Patented Case
View Patent ↗
Granted: Jan 2, 1990
Filed: Apr 13, 1988
Inventors
Douglas S. Martin
Joseph W. J. Maas
Assignee (at issue)
AFA Products, 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.