Granted Patent
Utility
US 4,240,609 · App. 05/931,462
Flow control apparatus
Inventors:
Guerry L. Hahn, Gerald S. Baker
Patented Case
View Patent ↗
Granted: Dec 23, 1980
Filed: Aug 7, 1978
Inventors
Guerry L. Hahn
Gerald S. Baker
Assignee (at issue)
Cameron Iron Works, Inc.
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.