Granted Patent
Utility
US 4,214,925 · App. 05/952,160
Method for fabricating brazed aluminum fin heat exchangers
Inventors:
Koji Arita, Masahiro Chiji, Takayoshi Asami, Yasuhumi Karaki, Toshihiko Endo
Patented Case
View Patent ↗
Granted: Jul 29, 1980
Filed: Oct 17, 1978
Inventors
Koji Arita
Masahiro Chiji
Takayoshi Asami
Yasuhumi Karaki
Toshihiko Endo
Assignee (at issue)
KOBE STEEL, 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.