Granted Patent
Utility
US 5,799,042 · App. 08/543,669
Wireless digital communication system, a radio apparatus, a digital speaker, and a digital speaker controlling apparatus
Inventor:
Qun Xiao
Patented Case
View Patent ↗
Granted: Aug 25, 1998
Filed: Oct 16, 1995
Inventor
Qun Xiao
Assignee (at issue)
U.S. Philips Corporation
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.