Granted Patent
Utility
US 4,196,937 · App. 05/921,884
Load sensing control valve
Inventor:
Edward J. Falk
Patented Case
View Patent ↗
Granted: Apr 8, 1980
Filed: Jul 3, 1978
Inventor
Edward J. Falk
Assignee (at issue)
Wagner Electric Corporation
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.