Granted Patent
Utility
US 5,195,673 · App. 07/765,333
Method and apparatus for convection brazing of aluminum heat exchangers
Inventors:
Michael J. Irish, Gary A. Halstead, Brian L. Barten
Patented Case
View Patent ↗
Granted: Mar 23, 1993
Filed: Sep 25, 1991
Inventors
Michael J. Irish
Gary A. Halstead
Brian L. Barten
Assignee (at issue)
General Motors LLC
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.