Granted Patent
Utility
US 5,385,645 · App. 08/081,039
Heat transfer apparatus with positive drive orbital whip rod
Inventor:
Yao Li
Patented Case
View Patent ↗
Granted: Jan 31, 1995
Filed: Jun 22, 1993
Inventor
Yao Li
Assignee (at issue)
Y.T. Li Engineering, 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.