Granted Patent
Utility
US 6,288,916 · App. 09/419,220
Multiple output uninterruptible alternating current power supplies for communications system
Inventors:
Frank Liu, Pu Han, Lam Vu
Patented Case
View Patent ↗
Granted: Sep 11, 2001
Filed: Oct 15, 1999
Inventors
Frank Liu
Pu Han
Lam Vu
Assignee (at issue)
ALPHA TECHNOLOGIES LTD.
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.