Granted Patent
Utility
US 4,897,184 · App. 07/925,305
Fluid flow apparatus control and monitoring
Inventors:
David R. Shouldice, Daniel A. Powell, Tom L. Brose
Patented Case
View Patent ↗
Granted: Jan 30, 1990
Filed: Oct 31, 1986
Inventors
David R. Shouldice
Daniel A. Powell
Tom L. Brose
Assignee (at issue)
Cobe Laboratories, 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.