claim6-3#0021

computer readable program code means for, responsive to the difference between the bit-map image and the image displayed on the source display unit exceeding a predetermined threshold, updating the bit-map image by copying the image displayed on the source display unit, and transmitting the bit-map image to the at least one destination data processing system.
- Anfossi, et al. Screen remote control. U.S.Patent 6,141,022. October 31, 2000.