Granted Patent
Utility
US 6,434,207 · App. 09/492,126
Inspection method and apparatus for piping
Inventors:
Yuuichirou Mizumachi, Makiko Miyauchi, Masakazu Hisatsune, Fuminobu Takahashi
Patented Case
View Patent ↗
Granted: Aug 13, 2002
Filed: Jan 27, 2000
Inventors
Yuuichirou Mizumachi
Makiko Miyauchi
Masakazu Hisatsune
Fuminobu Takahashi
Assignee (at issue)
HITACHI, LTD.
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.