Granted Patent
Utility
US 4,360,040 · App. 06/125,273
Multiple orifice valves
Inventors:
Harry Richard Cove, John D. Muchow
Patented Case
View Patent ↗
Granted: Nov 23, 1982
Filed: Feb 27, 1980
Inventors
Harry Richard Cove
John D. Muchow
Assignee (at issue)
SMITH 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.