Granted Patent
Utility
US 4,867,486 · App. 07/112,699
Soldering structure of tubular material
Inventors:
Akio Fukata, Yoshihisa Fujisawa
Patented Case
View Patent ↗
Granted: Sep 19, 1989
Filed: Oct 26, 1987
Inventors
Akio Fukata
Yoshihisa Fujisawa
Assignee (at issue)
Diesel Kiki Co., 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.