Granted Patent
Utility
US 6,662,860 · App. 10/200,449
Heat transfer pipe for liquid medium having grooved inner surface and heat exchanger employing the same
Inventors:
Takashi Iwamoto, Shinichi Ono, Yukio Sato, Masayuki Kawai, Yasushi Owaki, Masashi Tomiie, Shunroku Sukumoda, Kohtaroh Nagahara
Patented Case
View Patent ↗
Granted: Dec 16, 2003
Filed: Jul 23, 2002
Inventors
Takashi Iwamoto
Shinichi Ono
Yukio Sato
Masayuki Kawai
Yasushi Owaki
Masashi Tomiie
Shunroku Sukumoda
Kohtaroh Nagahara
Assignee (at issue)
THE JAPAN STEEL WORKS, 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.