Granted Patent
Utility
US 5,530,234 · App. 08/370,759
Hand held calculator having a retractable cover
Inventors:
Philip Kwok Nan Loh, Soo Huat Quek
Patented Case
View Patent ↗
Granted: Jun 25, 1996
Filed: Dec 23, 1994
Inventors
Philip Kwok Nan Loh
Soo Huat Quek
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.