Granted Patent
Utility
US 4,674,019 · App. 06/852,566
Transformer-coupled two-inductor buck converter
Inventor:
Robert Matthew Martinelli
Patented Case
View Patent ↗
Granted: Jun 16, 1987
Filed: Apr 16, 1986
Inventor
Robert Matthew Martinelli
Assignee (at issue)
Keller-Mullett Technology
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.