Granted Patent
Utility
US 6,202,645 · App. 09/257,470
Control valve actuated by low-pressure and low-flow rate control fluid
Inventor:
Robert Brown
Patented Case
View Patent ↗
Granted: Mar 20, 2001
Filed: Feb 25, 1999
Inventor
Robert Brown
Assignee (at issue)
Porter Instruments, 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.