Granted Patent
Utility
US 6,049,290 · App. 08/874,824
Control button interface for a portable communications device
Inventor:
Whitfield G. Halstead
Patented Case
View Patent ↗
Granted: Apr 11, 2000
Filed: Jun 13, 1997
Inventor
Whitfield G. Halstead
Assignee (at issue)
Wireless Access
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.