Granted Patent
Utility
US 5,990,975 · App. 08/755,068
Dual screen displaying device
Inventors:
Liu Po Nan, Wang Cheng Chung, Zeng Huang
Patented Case
View Patent ↗
Granted: Nov 23, 1999
Filed: Nov 22, 1996
Inventors
Liu Po Nan
Wang Cheng Chung
Zeng Huang
Assignee (at issue)
Acer Peripherals, 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.