Granted Patent
Utility
US 5,457,620 · App. 08/099,781
Current estimating circuit for switch mode power supply
Inventor:
Douglas Dromgoole
Patented Case
View Patent ↗
Granted: Oct 10, 1995
Filed: Jul 30, 1993
Inventor
Douglas Dromgoole
Assignee (at issue)
AT & T IPM Corp.
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.