Granted Patent
Utility
US 5,161,213 · App. 07/671,639
Method for black and white image reduction based upon averaging black/white pixel counts of neighboring blocks
Inventor:
Kenneth C. Knowlton
Patented Case
View Patent ↗
Granted: Nov 3, 1992
Filed: Mar 18, 1991
Inventor
Kenneth C. Knowlton
Assignee (at issue)
Wang Laboratories, Inc.
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.