Granted Patent
Utility
US 4,527,772 · App. 06/443,361
Modulating control valve
Inventors:
Berhanu Kebede, Marion L. George
Patented Case
View Patent ↗
Granted: Jul 9, 1985
Filed: Nov 22, 1982
Inventors
Berhanu Kebede
Marion L. George
Assignee (at issue)
International Telephone and Telegraph 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.