Granted Patent
Utility
US 4,953,403 · App. 07/324,389
Positive displacement flushable flow meter
Inventor:
Carl M. Springer
Patented Case
View Patent ↗
Granted: Sep 4, 1990
Filed: Mar 15, 1989
Inventor
Carl M. Springer
Assignee (at issue)
Binks Manufacturing 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.