Granted Patent
Utility
US 6,140,572 · App. 09/318,974
Transformer tank with detachable cabinet interface
Inventor:
William J. Book
Patented Case
View Patent ↗
Granted: Oct 31, 2000
Filed: May 26, 1999
Inventor
William J. Book
Assignee (at issue)
ABB Power T&D Company 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.