Granted Patent
Utility
US 4,941,518 · App. 07/052,698
Fluid injection system
Inventors:
Harold R. Williams, Robert M. Spencer
Patented Case
View Patent ↗
Granted: Jul 17, 1990
Filed: May 20, 1987
Inventors
Harold R. Williams
Robert M. Spencer
Assignee (at issue)
Johnson & Johnson Medical GMBH
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.