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Actor Marlon Brando has four patents, all named "Drumhead tensioning device and method."
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| Number | Title | Issue Date |
| 7426165 | Method and apparatus of recording information in reduced waiting time A method, apparatus and computer-readable recording medium are disclosed, for recording information in an information recording medium. The method includes a first step of outputting, in response to an initialization request for initializing the information recordin... | 09/16/2008 |
| 7423941 | Multi-layered information recording medium, reproduction apparatus, and recording apparatus, with defect list storing areas A multi-layered information recording medium comprising a plurality of recording layers, a user data area for recording user data, provided in at least two of the plurality of recording layers, and a defect list storing area for storing a defect list. When at least ... | 09/09/2008 |
| 7423953 | Optical module and optical recording and/or reproducing apparatus An optical module has a first light source which emits a first light beam from a first light emission point in a predetermined direction, a second light source which emits a second light beam from a second light emission point in the predetermined direction, and an ... | 09/09/2008 |
| 7420894 | Optical pickup device Provided is an optical pickup device whose optical axis adjustment can be performed while an increase in cost is suppressed and whose optical axis correction can be accurately performed even when a variation in arrangement between laser elements occurs. The optical ... | 09/02/2008 |
| 7420898 | Multi-layered information recording medium, reproduction apparatus, and recording apparatus with defect list storing areas A multi-layered information recording medium comprising a plurality of recording layers, a user data area for recording user data, provided in at least two of the plurality of recording layers, and a defect list storing area for storing a defect list. When at least ... | 09/02/2008 |
| 7420891 | Optical pickup device having heat radiation means and optical disk apparatus using the same An optical pickup device comprises a semiconductor laser that causes outgoing of laser beam used for reproduction and recording of information on an optical disk, and an objective lens that conducts the laser beam outgoing from the semiconductor laser to the optical... | 09/02/2008 |
| 7420900 | Multi-layered information recording medium, reproduction apparatus, and recording apparatus, with defect list storing areas A multi-layered information recording medium comprising a plurality of recording layers, a user data area for recording user data, provided in at least two of the plurality of recording layers, and a defect list storing area for storing a defect list. When at least ... | 09/02/2008 |
| 7420899 | Multi-layered information recording medium, reproduction apparatus, and recording apparatus, with defect list storing areas A multi-layered information recording medium comprising a plurality of recording layers, a user data area for recording user data, provided in at least two of the plurality of recording layers, and a defect list storing area for storing a defect list. When at least ... | 09/02/2008 |
| 7420905 | Information reproducing method judging a multivalued level of a present cell by referring to judged multivalued levels of a preceding cell and an ensuing cell A mark representing information of a multivalued level is recorded in each of cells arranged in a recording medium. Upon reproducing the multivalued level from a reproduction signal of the recording medium, the multivalued level of a present cell is judged by referr... | 09/02/2008 |
| 7414933 | Reproducing apparatus having an improved PLL circuit and related computer program In a PLL circuit, a phase error of a reproduced signal is extracted in either a way based on a zero-cross timing or a way based on a self-running timing. A decision is made as to whether the reproduced signal is in a continuous-wave interval where an inversion perio... | 08/19/2008 |
| 7414940 | Calibration of a focus error signal gain in a focus servo system A calibration of a focus error signal gain in a focus servo system of an optical disk drive is presented. The focus error signal gain can be calibrated by oscillating an optical pick-up unit in a focus direction through a focus point and determining a focus sum thre... | 08/19/2008 |
| 7411881 | Information recording apparatus, method and system, with increased likelihood for recording information at appropriate recording conditions An information recording apparatus records information on an information recording medium by focusing a light beam emitted from a light source on the information recording medium. The apparatus has an information reading device of a type of the information recording... | 08/12/2008 |
| 7411876 | Apparatus and method for controlling tracking in disc drive by monitoring tracking actuator deviation An apparatus and method of controlling tracking in a disc drive using a tracking actuator, a feed motor, and an objective lens, including monitoring whether the tracking actuator deviates from a dynamic range based on a signal controlling the feed motor when trackin... | 08/12/2008 |
| 7411891 | Method of transferring data with respect to optical information storage medium having different track pitches An optical information storage medium includes a lead-in area, a lead-out area, and a user data area between the lead-in and lead-out areas and in which user data is recorded. Pits are formed in the lead-in area, the user data area, and the lead-out area, and a trac... | 08/12/2008 |
| 7408862 | Writable recording medium identification information recording method information recording device identification information reproduction method and information reproduction device An information playback method and apparatus that includes reading first identification information from an auxiliary recording region of a recording medium, including the auxiliary recording region in which writing of content data is prohibited and a main storing r... | 08/05/2008 |
| 7406009 | Information recording/reproducing apparatus and information reproducing method An information recording/reproducing apparatus and information reproducing method records information data, regardless of an external disturbance. According to a demodulated timing pulse, a synchronization signal and address data representative of an address is demo... | 07/29/2008 |
| 7406013 | Optical disc drive In a recordable data storage medium on which property data was recorded after having been modulated and on which data that is decodable by a cryptographic key to be generated from the property data was recorded, the property data was preferably modulated by a differ... | 07/29/2008 |
| 7406008 | Recording medium and system for recording and reproducing the recording medium using control information that represents the number of sets of information composing the multiplexed audio information A recording medium has a first recording area on which multiplexed audio informations are recorded as sets of one or more information units, a second recording area on which control information for controlling recording of the multiplexed audio informations are reco... | 07/29/2008 |
| 7403454 | Optical apparatus and aberration correcting element for correcting aberration by independent control of phase distribution and defocus pattern variables Even in the case where there is used technique such as “high NA”, “multi-layer recording”, etc., in order to carry out optimum correction of wave front aberration produced thereby with a simple technique, such an aberration correcting element to vary variabl... | 07/22/2008 |
| 7403459 | Rotational speed control method for a disk player A method is disclosed for adjusting the rotational speed of a disk player based on a calculated variable. The method increases the rotational speed of the disk player when the calculated variable is greater than a first threshold and decreases the rotational speed o... | 07/22/2008 |
| 7403463 | Method and apparatus for filtering read signal to three or more cutoff frequencies with two or more bits control line throughout three or more consecutive periods An optical disk drive apparatus is provided has a reading section which reads the reflection of a laser beam from a disk to produce a read signal, a filter section which filters the read signal with the use of three or more different cutoff frequencies upon receivin... | 07/22/2008 |
| 7403465 | Method and apparatus for writing on an optical disk with beam spots aligned at an angle to data tracks Data is written on a plurality of data tracks on an optical disk by a plurality of laser beams. The spots illuminated by the beams are spaced apart to prevent thermal interference. The spots are aligned along a line at an angle to the tangent of the data tracks. The... | 07/22/2008 |
| 7394733 | Optical head with spherical aberration correction and method of using same An optical head with excellent optical characteristics even when using a light source that substantially has a wavelength broadening is provided. The optical head includes a light source, an objective lens for focusing a light beam emitted from the light source on a... | 07/01/2008 |
| 7388817 | Method and apparatus for measuring head gap length of composite head After the read head of a composite head reads sector data from a disk, a read circuit detects a sync mark in the sector data. The read circuit demodulates user data subsequent to the detected sync mark, and outputs it to a disk controller. A sequencer incorporated i... | 06/17/2008 |
| 7385900 | Reproducing apparatus A transversal filter subjects a reproduced signal to partial-response waveform equalization responsive to tap coefficients to generate an equalization-resultant signal. There is generated 0-point information representing whether or not the reproduced signal correspo... | 06/10/2008 |
| 7385888 | Tracking system with dual differential signals with fraction of A/C signal added back to D/C signal Tracking system for guiding an optical beam on tracks on an optical disc, said tracking system comprising a photodetector (A1, A2) for detecting optical beams derived from said optical beam, said photodetector generating a first output signal (A) and a... | 06/10/2008 |
| 7385893 | Method for forming marks on write-once medium than applying second beam with power level lower than read power set for a predetermined time A write-once high density optical recording medium capable of a high speed recording that effectively forms space between recording marks. A recording layer 18 of a high speed write-once optical recording medium 10 is formed by laminating a first sub r... | 06/10/2008 |
| 7382706 | Method for controlling a multi-pulse record waveform at high velocity in a phase change optical medium A driving power is applied to a light source to control emission of a light beam to a recording layer of an optical storage medium, the driving power including a sequence of mark and space portions, each mark portion having a pulse width that corresponds to a multip... | 06/03/2008 |
| 7379405 | Method and optical disk drive for promptly protecting voice coil motor thereof from over current The invention is disclosed a method for promptly protecting a voice coil motor in an optical disk drive. A step (A) allows a data signal processor (DSP) to execute a protect module of the voice coil motor every preset time interval. In a step (B), the DSP executes f... | 05/27/2008 |
| 7379404 | Apparatus and method of compensating for tilt and/or defocus of a disc during recording A method of compensating for tilt and/or defocus and an apparatus therefor. The apparatus has a tilt and/or defocus detector detecting the tilt and/or defocus of an optical recording medium, and a recording compensator compensating a write pulse having a predetermin... | 05/27/2008 |
| 7376067 | Allocation of real time files When recording data on a medium where a certain data rate is required, an allocation manager in the player must allocate sections of the logical space in such a way that the recording medium is efficiently filled and that an adequate data rate can be guaranteed even... | 05/20/2008 |
| 7372787 | Optical disc recording and reproducing apparatus permitting recording tests using external buffer memory and method of driving the apparatus An optical disc recording and reproducing apparatus permitting a recording test using an external memory, and a method of driving the apparatus is provided. The optical disc recording and reproducing apparatus reads and bypasses test data to be recorded, which is st... | 05/13/2008 |
| 7359299 | Recording medium and reading system A medium judgment program is recorded on an information recording medium. The program causes a computer to judge whether the medium is authorized. The judgment may be based on information on a unique value preformed in the medium in regard to each of the media. If t... | 04/15/2008 |
| 7359304 | Method for recording wobble signals on an optical disc and optical disc on which the wobble signals are recorded After pre-coding bit data of address information to be recorded on an optical disc on the basis of at least 4 wobble units, wobble data pre-coded on at least 4 wobble units is modulated by a BPSK (Binary Phase Shift Keying) or ASK (Amplitude Shift Keying) method, an... | 04/15/2008 |
| 7355932 | Optical disk device for detecting thickness errors of the transparent substrate The invention detects the thickness error of the transparent substrate using a general focus error signal detection system employing the fact that the reflecting light from the optical disk causes distortions in diffraction image at the detection plane or unsymmetri... | 04/08/2008 |
| 7355953 | Optical pickup for cutting off optical noise and optical recording and/or reproducing apparatus using the same An optical pickup includes a light source which emits light, a grating which separates a portion of the light emitted from the light source, a reflecting member which reflects another portion of the light emitted from the light source, a monitoring photodetector dis... | 04/08/2008 |
| 7349320 | Apparatus for switching modes based on quantity of light received in first section of a photodetector section and first plus second section for controlling a laser diode output An optical-disk drive device is provided which is capable of executing recording or reproduction at a plurality of numerical apertures and keeping constant the quantity of light which is emitted by a light-emitting element. This optical-disk drive device includes: l... | 03/25/2008 |
| 7349301 | Write-once recording medium on which portion of the data is logically overwritten A recording medium that is a write-once recording medium with data rewritability, thereby increasing the usability of the write-once recording medium, is provided. In a write-once recording medium, a main data area has a normal record and playback sub-area (a user d... | 03/25/2008 |
| 7345967 | Optical pickup unit An optical pickup unit includes a light source emitting a light beam, an objective lens focusing the light beam onto an information recording medium, a light detection part receiving the light beam reflected from the information recording medium, and a light blockin... | 03/18/2008 |
| 7345972 | Rotation control method and storage apparatus A storage apparatus rotates an optical recording medium at two or more kinds of rotational speeds. The rotational speed is decreased when a read or write margin becomes less than or equal to a first predetermined value or, when a frequency of generation of a servo a... | 03/18/2008 |
