Granted Patent
Utility
US 4,581,198 · App. 06/539,681
Double-cylinder selector valve for detecting and locating failed nuclear fuel assemblies
Inventors:
Mitsuru Kamei, Hiroshi Rindo
Patented Case
View Patent ↗
Granted: Apr 8, 1986
Filed: Oct 6, 1983
Inventors
Mitsuru Kamei
Hiroshi Rindo
Assignee (at issue)
Doryokuro Kakunenryo Kaihatsu Jigyodan
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.