Granted Patent
Utility
US 4,775,293 · App. 07/026,767
Pump with heat exchanger
Inventor:
Clark S. Boster
Patented Case
View Patent ↗
Granted: Oct 4, 1988
Filed: Mar 17, 1987
Inventor
Clark S. Boster
Assignee (at issue)
BW/IP International, 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.