Granted Patent
Utility
US 6,021,499 · App. 09/050,957
Isolated ground reference DC power supply
Inventor:
Rassoul Aleshi
Patented Case
View Patent ↗
Granted: Feb 1, 2000
Filed: Mar 31, 1998
Inventor
Rassoul Aleshi
Assignees (at issue)
SONY CORPORATION OF JAPAN
SONY ELECTRONICS INC.
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.