Granted Patent
Utility
US 4,536,696 · App. 06/513,775
Buck-boost converter with dual-mode control for battery charging
Inventor:
Richard C. Ray
Patented Case
View Patent ↗
Granted: Aug 20, 1985
Filed: Jul 14, 1983
Inventor
Richard C. Ray
Assignee (at issue)
AT&T Bell Laboratories
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.