Granted Patent
Utility
US 5,481,616 · App. 08/148,597
Plug-in sound accessory for portable computers
Inventor:
Tommyca Freadman
Patented Case
View Patent ↗
Granted: Jan 2, 1996
Filed: Nov 8, 1993
Inventor
Tommyca Freadman
Assignee (at issue)
Sparkomatic Corp.
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.