Granted Patent
Utility
US 4,616,695 · App. 06/699,163
Heat exchanger
Inventors:
Kenzo Takahashi, Nobuo Kumazaki, Hisao Yokoya, Hironobu Nakamura, Tadakatsu Kachi
Patented Case
View Patent ↗
Granted: Oct 14, 1986
Filed: Feb 7, 1985
Inventors
Kenzo Takahashi
Nobuo Kumazaki
Hisao Yokoya
Hironobu Nakamura
Tadakatsu Kachi
Assignee (at issue)
MITSUBISHI ELECTRIC CORPORATION
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.