Granted Patent
Utility
US 5,887,847 · App. 08/932,655
Digitally controllable flow rate valve
Inventor:
Peter A. Holborow
Patented Case
View Patent ↗
Granted: Mar 30, 1999
Filed: Sep 18, 1997
Inventor
Peter A. Holborow
Assignee (at issue)
Automatic Switch 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.