Granted Patent
Utility
US 5,386,629 · App. 08/210,749
Tube for heat exchangers and a method for manufacturing the tube
Inventors:
Wataru Ouchi, Katsuhisa Suzuki, Toshinori Tokutake, Hirosaburo Hirano
Patented Case
View Patent ↗
Granted: Feb 7, 1995
Filed: Mar 17, 1994
Inventors
Wataru Ouchi
Katsuhisa Suzuki
Toshinori Tokutake
Hirosaburo Hirano
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.