Granted Patent
Utility
US 5,243,842 · App. 07/915,081
Method of making a brazeable metal pipe having tube-insertion apertures formed with guide lugs
Inventors:
Hideyuki Kobayashi, Mitsuru Nobusue, Noboru Kodachi, Tustomu Motohashi, Hironaka Sasaki, Ryoichi Hoshino, Koji Tomita, Haruo Fujinuma
Patented Case
View Patent ↗
Granted: Sep 14, 1993
Filed: Jul 16, 1992
Inventors
Hideyuki Kobayashi
Mitsuru Nobusue
Noboru Kodachi
Tustomu Motohashi
Hironaka Sasaki
Ryoichi Hoshino
Koji Tomita
Haruo Fujinuma
Assignee (at issue)
Showa Aluminum Corp.
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.