Featured patents

Optical Pickup Apparatus Having Diffractive Element for Focusing and Tracking Plurality of Light Types
US 08867325 B2, Oct. 21, 2014, Arithmetic operation using plural photodetectors, Shinzoh Murakami / Sharp Kabushiki Kaisha (Osaka-shi, JP)
An optical pickup apparatus comprising:…

Near Field Transducer With Shaped Energy Radiating End
US 08773959 B2, July 8, 2014, Near field optic, Yongjun Zhao et al. / Seagate Technology LLC (Cupertino, US)
An apparatus comprising:…

Optical Recording Medium, Recording/Reproducing Apparatus, Recording/Reproducing Method
US 08737181 B2, May 27, 2014, Including static memory accessing, Koji Sekiguchi et al. / Sony Corporation (Tokyo, JP)
An optical recording medium, comprising:…

Objective Lens Drive Device and Optical Pickup
US 08743668 B2, June 3, 2014, Optical head servo system structure, Ryuichiro Mizuno et al. / Hitachi Media Electronics Co., Ltd. (Iwate, JP)
An objective lens drive device, comprising:…

PLL Circuit and Disk Drive
US 08693296 B2, April 8, 2014, For phase, timing, or rate processing, Hiromi Honma / NEC Corporation (Tokyo, JP)
A PLL circuit that extracts a synchronizing clock from an analog signal…

Optical Disk Apparatus
US 08675459 B2, March 18, 2014, Means to compensate for defect or abnormal condition, Fumio Isshiki / Hitachi Media Electronics Co., Ltd. (Iwate, JP)
An optical disk apparatus comprising:…

Optical Disk Device, Optical Disk Control Method, and Integrated Circuit
US 08619527 B2, Dec. 31, 2013, Power control for energy producing device, Usui Makoto et al. / Panasonic Corporation (Osaka, JP)
An optical disk device for writing a recordable mark onto an optical disk having…

Method of Recording Temporary Defect List on Write-Once Recording Medium, Method of Reproducing the Temporary Defect List, Recording And/Or Reproducing Apparatus, and the Write-Once Recording Medium
US 08514677 B2, Aug. 20, 2013, By medium defect indicative control signal, Jung-wan Ko et al. / Samsung Electronics Co., Ltd. (Suwon-si, KR)
An apparatus for recording data on a write-once recording medium, the apparatus…

Thermally-Assisted Magnetic Recording Head, Head Gimbal Assembly and Magnetic Recording Device
US 08493818 B2, July 23, 2013, Near field optic, Katsuki Kurihara et al. / TDK Corporation (Tokyo, JP)
A thermally-assisted magnetic recording head, comprising:…

Multilayer Optical Disc for Easy Positioning of a Focused Beam
US 08483030 B2, July 9, 2013, Having layered storage medium, Yoshinori Ishikawa et al. / Hitachi Consumer Electronics Co., Ltd. (Tokyo, JP)
A multilayer optical disc having three or more recording layers having…

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