Granted Patent
Utility
US 5,070,937 · App. 07/660,330
Internally enhanced heat transfer tube
Inventors:
Louis J. Mougin, Floyd C. Hayes
Patented Case
View Patent ↗
Granted: Dec 10, 1991
Filed: Feb 21, 1991
Inventors
Louis J. Mougin
Floyd C. Hayes
Assignee (at issue)
American Standard 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.