Granted Patent
Utility
US 4,742,441 · App. 06/934,247
High frequency switching power converter
Inventor:
Steven C. Akerson
Patented Case
View Patent ↗
Granted: May 3, 1988
Filed: Nov 21, 1986
Inventor
Steven C. Akerson
Assignee (at issue)
Heart Interface 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.