Granted Patent
Utility
US 5,470,531 · App. 07/970,781
Exchanger and method for manufacturing the same
Inventors:
Axel Sjogren, Gary A. Carson, Steve Estergreen, Timothy Michael Taga, Rodger L. Stewart
Patented Case
View Patent ↗
Granted: Nov 28, 1995
Filed: Nov 3, 1992
Inventors
Axel Sjogren
Gary A. Carson
Steve 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.