Granted Patent
Utility
US 5,468,449 · App. 08/272,524
Exchanger and method for manufacturing the same
Inventors:
Axel Sjogren, Gary A. Carson, Steven L. Estergreen, Timothy Michael Taga, Rodger L. Stewart
Patented Case
View Patent ↗
Granted: Nov 21, 1995
Filed: Jul 11, 1994
Inventors
Axel Sjogren
Gary A. Carson
Steven L. Estergreen
Timothy Michael Taga
Rodger L. Stewart
Assignee (at issue)
Cobe Laboratories, Inc.
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.