Searching US Patent Collection...

	PAT. NO.		Title
1	4,307,411		Nonvolatile semiconductor memory device and method of its manufacture
2	4,217,605		Comb filter employing a charge transfer device with plural mutually proportioned signal charge inputs
3	4,126,836		Balanced capacitance charge transfer device
4	4,040,092		Smear reduction in CCD imagers
5	4,027,260		Charge transfer circuits exhibiting low pass filter characteristics
6	3,911,467		Interlaced readout of charge stored in charge-coupled image sensing array
7	3,864,722		RADIATION SENSING ARRAYS