Granted Patent
Utility
US 4,246,932 · App. 06/086,178
Multiple additive valve assembly
Inventor:
Kenneth C. Raines
Patented Case
View Patent ↗
Granted: Jan 27, 1981
Filed: Oct 18, 1979
Inventor
Kenneth C. Raines
Assignee (at issue)
Burron Medical, 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.