Granted Patent
Utility
US 4,982,785 · App. 07/489,461
Serpentine heat exchanger
Inventor:
Ronald S. Tomlinson
Patented Case
View Patent ↗
Granted: Jan 8, 1991
Filed: Mar 6, 1990
Inventor
Ronald S. Tomlinson
Assignee (at issue)
Inter-City Products Corporation (USA)
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.