Patents by Inventor Isao Satoh

Isao Satoh has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6317407
    Abstract: The optical disk of this invention includes a read-only area in which a plurality of read-only tracks are formed and a rewritable area in which a plurality of rewritable tracks are formed, wherein each of the plurality of read-only tracks is divided into a plurality of first sectors, a signal is prerecorded in at least one of the plurality of first sectors under a predetermined reproduction format, each of the plurality of rewritable tracks is divided into a plurality of second sectors, a signal is recordable in at least one of the plurality of second sectors under a predetermined recording format including the predetermined reproduction format, and the read-only area is located on an inner portion of the optical disk, while the rewritable area is located on an outer portion of the optical disk.
    Type: Grant
    Filed: April 10, 2000
    Date of Patent: November 13, 2001
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshinari Takemura, Takashi Ishida, Shunji Ohara, Isao Satoh
  • Publication number: 20010039318
    Abstract: Provided is a process for producing an ethylenimine polymer aqueous solution which has a high concentration (high resin content) and is less changeable with the passage of time, that is, has a stabilized quality. The above process comprises polymerizing ethylenimine in a water based medium at a temperature of 80° C. or lower and then ripening it at a temperature of 100 to 150° C.
    Type: Application
    Filed: March 19, 2001
    Publication date: November 8, 2001
    Applicant: NIPPON SHOKUBAI CO., LTD.
    Inventors: Seiichi Suzuki, Yoshiyuki Onda, Isao Satoh
  • Patent number: 6314078
    Abstract: In a recording and reproducing apparatus for a disc-shaped recording medium, and a defect substitution method for a disc-shaped recording medium (8), whether reproduction of recorded data is good is determined by sector unit and not by product code unit, defective sector discrimination is performed by sector unit, and only sectors determined defective are alternately recorded, when using a recording format in which data that is error detection and correction coded with a product code is segmented and recorded to a plurality of sectors.
    Type: Grant
    Filed: June 21, 2000
    Date of Patent: November 6, 2001
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yuji Takagi, Takahiro Nagai, Yoshihisa Fukushima, Shunji Ohara, Isao Satoh
  • Patent number: 6301220
    Abstract: In a recording and reproducing apparatus for a disc-shaped recording medium, and a defect substitution method for a disc-shaped recording medium (8), whether reproduction of recorded data is good is determined by sector unit and not by product code unit, defective sector discrimination is performed by sector unit, and only sectors determined defective are alternately recorded, when using a recording format in which data that is error detection and correction coded with a product code is segmented and recorded to a plurality of sectors.
    Type: Grant
    Filed: June 21, 2000
    Date of Patent: October 9, 2001
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yuji Takagi, Takahiro Nagai, Yoshihisa Fukushima, Shunji Ohara, Isao Satoh
  • Publication number: 20010014730
    Abstract: Provided are processes by which an ethylenimine polymer and an aqueous solution thereof can advantageously be produced at low costs in an industrial scale. The ethylenimine polymer can be produced by polymerizing crude ethylenimine obtained by a simple distilling operation from an ethylenimine-containing reaction mixture produced by subjecting ethanolamine to intermolecular dehydration reaction, preferably crude ethylenimine having impurity contents which are controlled in the specific ranges. When the above crude ethylenimine is polymerized in an aqueous medium, capable of being obtained is an aqueous solution of an ethylenimine polymer having a higher molecular weight than that produced by non-solvent polymerization. The ethylenimine polymer can be purified by, for example, adding water thereto, mixing them and then vaporizing and removing water under heating. The aqueous solution of an ethylenimine polymer can be purified by heating and condensing it.
    Type: Application
    Filed: January 30, 2001
    Publication date: August 16, 2001
    Applicant: NIPPON SHOKUBAI CO., LTD.
    Inventors: Seiichi Suzuki, Yoshiyuki Onda, Isao Satoh
  • Patent number: 6175549
    Abstract: In a recording and reproducing apparatus for a disc-shaped recording medium, and a defect substitution method for a disc-shaped recording medium (8), whether reproduction of recorded data is good is determined by sector unit and not by product code unit, defective sector discrimination is performed by sector unit, and only sectors determined defective are alternately recorded, when using a recording format in which data that is error detection and correction coded with a product code is segmented and recorded to a plurality of sectors.
    Type: Grant
    Filed: September 17, 1999
    Date of Patent: January 16, 2001
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yuji Takagi, Takahiro Nagai, Yoshihisa Fukushima, Shunji Ohara, Isao Satoh
  • Patent number: 6167022
    Abstract: One or more optical discs, each having a ROM field having information with a length of at least one track formed in convex and concave pit rows, and a rewritable field capable of rewriting the information with a length of at least one track, an information unrecorded field having a length of at least one track located between the ROM field and rewritable field, the rewritable field having a spiral or concentric guide track oscillating in a radial direction, the ROM field having spiral or concentric convex and concave pit rows, and at least a part field at the rewritable field side of the information unrecorded field has a transition field having a spiral or concentric guide track oscillating in the radial direction continuously or intermittently and a track pitch To of the ROM field and a track pitch Tw between grooves and lands of the rewritable field have values such that To>Tw.
    Type: Grant
    Filed: September 21, 1999
    Date of Patent: December 26, 2000
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Takashi Ishida, Shin-ichi Tanaka, Akira Mutoh, Yoshinari Takemura, Shunji Ohara, Isao Satoh
  • Patent number: 6160770
    Abstract: An information recording method has;a history determination step for determining whether or not a medium being cased and capable of being used for information recording and reproduction has previously been taken out from the case by using an identification section having historical information as to whether the medium has previously been taken out from the case or not; anda verification step for verifying correctness of information recorded always or on condition that a predetermined condition is satisfied when a result of the determination shows that the medium has previously been taken out from the case.
    Type: Grant
    Filed: August 25, 1999
    Date of Patent: December 12, 2000
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Shunji Ohara, Takashi Ishida, Yoshikazu Goto, Isao Satoh
  • Patent number: 6137768
    Abstract: In an optical disc, an ID field contains a plurality of address information, and is preliminarily recorded in convex and concave signals, and is composed of two sets offset by about 1/2 track pitch toward the internal or external track direction adjacent to the guide track, an information recording field is composed of grooves and lands oscillating at a single frequency in the radial direction, and the grooves and lands alternate in every revolution of the guide track. When w bits of information are included in one period of oscillation, an information unrecorded field between the ID field and information recording field is arranged to have a length of w/10 bits or more and/or w bits or less, and therefore, when recording continuous information data such as video data, it is possible to record continuously by generating a clock securely from the oscillating signal, and moreover, the format efficiency is improved, so that a format of a larger capacity is achieved.
    Type: Grant
    Filed: October 27, 1997
    Date of Patent: October 24, 2000
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Takashi Ishida, Shin-ichi Tanaka, Akira Mutoh, Yoshinari Takemura, Shunji Ohara, Isao Satoh
  • Patent number: 6134214
    Abstract: In a recording and reproducing apparatus for a disc-shaped recording medium, and a defect substitution method for a disc-shaped recording medium, whether reproduction of recorded data is good is determined by sector unit and not by product code unit, defective sector discrimination is performed by sector unit, and only sectors determined defective are alternately recorded, when using a recording format in which data that is error detection and correction coded with a product code is segmented and recorded to a plurality of sectors.
    Type: Grant
    Filed: September 18, 1998
    Date of Patent: October 17, 2000
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yuji Takagi, Takahiro Nagai, Yoshihisa Fukushima, Shunji Ohara, Isao Satoh
  • Patent number: 6097683
    Abstract: An information recording/reproducing apparatus and a method of recording data onto an information recording/reproducing media. The information recording/reproducing apparatus has the capability of handling the information recording/reproducing media both when they are not in the case and when they are in the case. A recording mode is selected basing on the determinations of (i) whether or not the recording/reproducing medium is a medium type which is necessarily contained in a case at recording and (ii) whether the case is presence or absence. The recording mode is selected among (i) record information onto the information recording/reproducing medium, (ii) perform after-defect-inspection recording or defect-inspecting after recording, and (iii) inhibit recording of information.
    Type: Grant
    Filed: April 25, 1997
    Date of Patent: August 1, 2000
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Shunji Ohara, Takashi Ishida, Yoshikazu Goto, Isao Satoh
  • Patent number: 6078559
    Abstract: An optical disk includes a read-only area in which a plurality of read-only tracks are formed and a rewritable area in which a plurality of rewritable tracks are formed, wherein each of the plurality of read-only tracks is divided into a plurality of first sectors, a signal is prerecorded in at least one of the plurality of first sectors under a predetermined reproduction format, each of the plurality of rewritable tracks is divided into a plurality of second sectors, a signal is recordable in at least one of the plurality of second sectors under a predetermined recording format including the predetermined reproduction format, and the read-only area is located on an inner portion of the optical disk, while the rewritable area is located on an outer portion of the optical disk.
    Type: Grant
    Filed: October 21, 1997
    Date of Patent: June 20, 2000
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshinari Takemura, Takashi Ishida, Shunji Ohara, Isao Satoh
  • Patent number: 6038209
    Abstract: In an optical disk having a recording plane having a spiral first track and a spiral second track, information being to be recorded into and/or reproduced from said first and second tracks, the first track is formed into a groove-like shape, the second track is formed between adjacent the first tracks and into a land-like shape, and the first and second tracks record informations in different modulation methods.
    Type: Grant
    Filed: January 25, 1999
    Date of Patent: March 14, 2000
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventor: Isao Satoh
  • Patent number: 6021101
    Abstract: In an optical disk having a recording plane having a spiral first track and a spiral second track, information being to be recorded into and/or reproduced from said first and second tracks, the first track is formed into a groove-like shape, the second track is formed between adjacent the first tracks and into a land-like shape, and the first and second tracks record informations in different modulation methods.
    Type: Grant
    Filed: September 3, 1998
    Date of Patent: February 1, 2000
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventor: Isao Satoh
  • Patent number: 5933410
    Abstract: An optical disc using a single-spiral land and groove track format enabling accurate tracking offset correction and reliable detection of the transition point between a land track and a groove track, and a driving apparatus therefor. Four physical address areas PID1, PID2, PID3, and PID4 are recorded to a header area such that PID1 and PID2 are offset one-half track pitch toward the outside circumference of the disc from the groove track center, and PID3 and PID4 are offset one-half track pitch toward the inside circumference of the disc from the groove track center, and the physical address areas PID1-PID4 can be detected by means of a difference signal in the radial direction. The single frequency pattern area VFO at the beginning of each PID is lengthened by PID1 and PID3, thereby enabling tracking offset correction using a sum signal, and detection of the land-groove transition point using a difference signal obtained from the PID offset.
    Type: Grant
    Filed: June 26, 1997
    Date of Patent: August 3, 1999
    Assignees: Mitsubishi Denki Kabushiki Kaisha, Matsushita Electric Industrial Co. Ltd.
    Inventors: Kazuhiko Nakane, Hiroyuki Ohata, Masato Nagasawa, Kenji Gotoh, Yoshinobu Ishida, Isao Satoh, Shunji Ohara, Takashi Ishida, Yoshinari Takemura
  • Patent number: 5923640
    Abstract: An optical disc having both rewritable area and read-only area is disclosed. The rewritable area has a single spiral pattern of start track land at a leading edge, and a single spiral pattern of end track land at a trailing edge, whereby portions of the physical address area PID deviated approximately Pa/2 from the track of the rewritable area are being intruded into the start track land and the end track land.
    Type: Grant
    Filed: June 26, 1997
    Date of Patent: July 13, 1999
    Assignees: Matsushita Electric Industrial Co., Ltd., Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yoshinari Takemura, Shunji Ohara, Takashi Ishida, Isao Satoh, Kazuhiko Nakane, Masato Nagasawa, Yoshinobu Ishida
  • Patent number: 5920540
    Abstract: In an optical disk having a recording plane having a spiral first track and a spiral second track, information being to be recorded into and/or reproduced from said first and second tracks, the first track is formed into a groove-like shape, the second track is formed between adjacent the first tracks and into a land-like shape, and the first and second tracks record informations in different modulation methods.
    Type: Grant
    Filed: February 6, 1997
    Date of Patent: July 6, 1999
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventor: Isao Satoh
  • Patent number: 5883878
    Abstract: A multi-layered optical disk comprising a plurality of recording layers accumulated in the thickness direction wherein a light beam is focused on one of tracks of one of the layers thereby to record and reproduce data, the optical disk being characterized in that recording layers each have an identification section storing an address of the recording layer which the identification section belongs to.
    Type: Grant
    Filed: June 5, 1997
    Date of Patent: March 16, 1999
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Isao Satoh, Yoshihisa Fukushima, Yuji Takagi, Yasushi Azumatani, Hiroshi Hamasaka
  • Patent number: 5872767
    Abstract: An optical disk according to the present invention includes a first track having a spiral shape and a second track having a spiral shape, the first track and the second track adjoining each other, and information being recorded on or reproduced from the first track and the second track. The optical disk further includes an address region including: a first address block formed so as to be on both the first track and the second track adjoining the first track on an inner periphery side; and a second address block formed so as to be on both the first track and the second track adjoining the first track on an outer periphery side.
    Type: Grant
    Filed: February 14, 1996
    Date of Patent: February 16, 1999
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Takahiro Nagai, Isao Satoh, Yuji Takagi, Yuji Hisakado, Yoshito Aoki, Shunji Ohara, Takashi Ishida
  • Patent number: RE37185
    Abstract: In an optical disc recording-reproducing apparatus using a standard optical disc enclosed in a cartridge, and optical plate for correcting various aberrations generated by a focusing lens is comprised therein in order to allow use of a double recording optical disc enclosed in the standard cartridge of the same size, the optical plate is placed in front of a focusing lens when the double recording optical disc is used, and is removed from the front of the focusing lens when the standard optical disc is used.
    Type: Grant
    Filed: July 10, 1997
    Date of Patent: May 22, 2001
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Isao Satoh, Sadao Mizumo, Noboru Itoh