Granted Patent
Utility
US 5,072,913 · App. 07/684,112
Spring loaded locking handle for angle cock or the like
Inventors:
John B. Carroll, Robert T. Sarsfield
Patented Case
View Patent ↗
Granted: Dec 17, 1991
Filed: Apr 12, 1991
Inventors
John B. Carroll
Robert T. Sarsfield
Assignee (at issue)
Westinghouse Air Brake Co.
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.