Granted Patent
Utility
US 4,332,261 · App. 06/190,152
Automatic hydraulic neutralizing mechanism
Inventor:
E. Graham Webster
Patented Case
View Patent ↗
Granted: Jun 1, 1982
Filed: Sep 24, 1980
Inventor
E. Graham Webster
Assignee (at issue)
Sperry Corp.
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.