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Doshida

Minoru Doshida, Yokohama JP

Patent application numberDescriptionPublished
20100032552OPTICAL SEMICONDUCTOR DEVICE - An optical semiconductor device includes a lower electrode layer formed over a semiconductor substrate, an infrared absorption layer formed over the lower electrode layer 02-11-2010

Yutaka Doshida, Takasaki-Shi JP

Patent application numberDescriptionPublished
20090309457PIEZO DRIVE SYSTEM - A piezo drive system includes an elastic fixing frame, a drive element, a rod, and a rotor. A vamplate portion is formed on the outer surface of the rod. One end of the rod is secured to around the center of a face of the drive element. The rotor consists of a cylindrical portion and a disk portion, and can rotate relative to the rod. Protrusions are formed on the inside of a top surface portion of the fixing frame to push against the disk portion. Using the drive element, the rod rotates while tilting and makes a surface contact with the vamplate portion, producing friction. Consequently, the rotor is rotated.12-17-2009

Yutaka Doshida, Gunma JP

Patent application numberDescriptionPublished
20110156540PIEZOELECTRIC CERAMIC, PROCESS FOR PRODUCING THE PIEZOELECTRIC CERAMIC, AND PIEZOELECTRIC DEVICE - As a piezoelectric ceramic having an alkaline-containing niobic acid-perovskite structure contains [K06-30-2011