Granted Patent
Utility
US 5,057,939 · App. 07/436,589
Data compression
Inventor:
Richard A. Kirk
Patented Case
View Patent ↗
Granted: Oct 15, 1991
Filed: Nov 15, 1989
Inventor
Richard A. Kirk
Assignee (at issue)
Crosfield Electronics Limited
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.