Granted Patent
Utility
US 6,792,069 · App. 10/230,259
Apparatus for inspecting a heat exchanger tube and group of heat exchanger tubes
Inventors:
Masaru Hirabayashi, Kuniaki Ara, Hitoshi Hayashida
Patented Case
View Patent ↗
Granted: Sep 14, 2004
Filed: Aug 29, 2002
Inventors
Masaru Hirabayashi
Kuniaki Ara
Hitoshi Hayashida
Assignee (at issue)
Japan Nuclear Cycle Development Institute
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.