Granted Patent
Utility
US 5,768,894 · App. 08/571,906
Apparatus, process and system for tube and whip rod heat exchanger
Inventors:
Yao Li, Albert P. Yundt, Jr., I-Chien Ho, Hong Huang
Patented Case
View Patent ↗
Granted: Jun 23, 1998
Filed: Dec 19, 1995
Inventors
Yao Li
Albert P. Yundt, Jr.
I-Chien Ho
Hong Huang
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.