Granted Patent
Utility
US 5,291,559 · App. 07/781,433
Computer speaker
Inventor:
Tommyca Freadman
Patented Case
View Patent ↗
Granted: Mar 1, 1994
Filed: Oct 23, 1991
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.