Granted Patent
Utility
US 4,449,414 · App. 06/371,885
Fluid-responsive apparatus
Inventor:
Terence J. Coates
Patented Case
View Patent ↗
Granted: May 22, 1984
Filed: Apr 26, 1982
Inventor
Terence J. Coates
Assignee (at issue)
Smiths Industries Public Limited Company
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.