sentences:  While examining the characteristics of MOS technology, he found it was capable of building capacitors, and that storing a charge or no charge on the MOS capacitor could represent the 1 and 0 of a bit, while the MOS transistor could control writing the charge to the capacitor.This led to his development of the single-transistor MOS DRAM memory cell.He filed a patent in 1967, and was granted U.S. patent number 3,387,286 in 1968.