Granted Patent
Utility
US 4,548,260 · App. 06/474,521
Heat exchanger
Inventor:
Victor J. Stachura
Patented Case
View Patent ↗
Granted: Oct 22, 1985
Filed: Mar 11, 1983
Inventor
Victor J. Stachura
Assignee (at issue)
American Precision Industries, 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.