Granted Patent
Utility
US 4,307,441 · App. 06/172,873
Current balanced DC-to-DC converter
Inventor:
Vincent G. Bello
Patented Case
View Patent ↗
Granted: Dec 22, 1981
Filed: Jul 28, 1980
Inventor
Vincent G. Bello
Assignee (at issue)
UNITED TECHNOLOGIES CORPORATION
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.