Searching US Patent Collection...

	PAT. NO.		Title
1	6,724,609		Electrostatic sensing chuck using area matched electrodes
2	6,370,005		Electrostatic sensing chuck using area matched electrodes
3	5,103,310		Interference reduction for extra-spectrum, compatible television system
4	4,412,254		Television receiver high voltage protection circuit
5	4,329,712		Adaptive distortion elimination circuitry for a video disc player
6	4,327,432		Video disc player with RFI reduction circuit
7	4,327,431		Video disc player with variable offset RFI reduction circuit
8	4,312,013		Non-linear aperture correction circuit