Granted Patent
Utility
US 4,526,041 · App. 06/581,520
Digital fluid flow rate sensor
Inventors:
Wilbert E. Beller, Edward J. Mateja
Patented Case
View Patent ↗
Granted: Jul 2, 1985
Filed: Feb 21, 1984
Inventors
Wilbert E. Beller
Edward J. Mateja
Assignee (at issue)
The Singer Company Limited
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.