Granted Patent
Utility
US 4,479,459 · App. 06/397,685
Sequencing blow down valve mechanism
Inventor:
Jack R. Piper
Patented Case
View Patent ↗
Granted: Oct 30, 1984
Filed: Jul 13, 1982
Inventor
Jack R. Piper
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.