Patents by Inventor Kazunari Komenou
Kazunari Komenou 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).
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Patent number: 6131257Abstract: A method of producing a SAW (Surface Acoustic Wave) device, including the steps of implanting ions in an entire surface of a piezoelectric member of the SAW device, so that an ion implantation layer is formed therein; performing a heat treatment of the piezoelectric member, so that a heat-treated ion implantation layer is formed in the entire surface of the piezoelectric member; and providing an electrode of a comb type resonator on the heat-treated ion implantation layer.Type: GrantFiled: January 8, 1998Date of Patent: October 17, 2000Assignee: Fujitsu LimitedInventors: Tokihiro Nishihara, Takashi Matsuda, Hidema Uchishiba, Osamu Ikata, Yoshio Satoh, Kazunari Komenou
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Patent number: 5796205Abstract: A SAW (Surface Acoustic Wave) device includes a piezoelectric member, a heat-treated ion implantation layer formed in a surface portion of the piezoelectric member, and an electrode of a comb type resonator with reflectors provided on said heat-treated ion implantation layer. The present invention also provides a method of producing such a SAW device.Type: GrantFiled: March 14, 1996Date of Patent: August 18, 1998Assignee: Fujitsu LimitedInventors: Tokihiro Nishihara, Takashi Matsuda, Hidema Uchishiba, Osamu Ikata, Yoshio Satoh, Kazunari Komenou
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Patent number: 4877717Abstract: A process for the production of optical elements which comprises forming on a substrate a light-sensitive film containing at least a photoreactive compound, and selectively exposing the film to radiation to cause migration of the unreacted compound from an unexposed area to an exposed area by the exposure. The present process is particularly useful in the low-cost mass-production of various micronized optical elements such as plastic microlenses and arrays thereof, optical waveguides, diffraction gratings, and holograms, for example. An optical device comprising the optical elements of the present invention is also disclosed.Type: GrantFiled: July 24, 1987Date of Patent: October 31, 1989Assignee: Fujitsu LimitedInventors: Toshihiro Suzuki, Yasuyuki Todokoro, Kazunari Komenou
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Patent number: 4810965Abstract: A position detector having a magnetic sensor for measuring linear or angular displacement, or detecting a position of a body without contact thereto. The detector has a closed circuit including magnets and yokes. The magnetic leakage flux which emanates from the inside surfaces of the yokes is utilized to detect the position of the body. The magnetic sensor is transferred along the inside surfaces of the yokes by a transferring circuit, which senses the magnetic field intensity of the leakage flux distributed thereon. This enables the detector to have a longer measuring range than that of a prior art detectors. An output signal is stable due to the shielding effect of the yokes. The magnetic closed circuit has many magnetic and mechanical configurations. For example, for the magnet, a permanent magnet and an electromagnet can be used.Type: GrantFiled: September 11, 1986Date of Patent: March 7, 1989Assignee: Fujitsu LimitedInventors: Yoshiro Fujiwara, Michiko Endo, Yuji Kojima, Noboru Wakatsuki, Akira Hirano, Kazunari Komenou
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Patent number: 4561069Abstract: A magnetic bubble memory device comprises minor loops for the storage of information and a major loop operably associated with the minor loops through gates, the minor loops being defined by an ion-implanted pattern and the gate portions of the major line being defined by patterns of magnetically soft material. This construction makes it possible to provide a high storage density and superior gate operating margins.Type: GrantFiled: June 20, 1983Date of Patent: December 24, 1985Assignee: Fujitsu LimitedInventors: Yoshio Satoh, Takeyasu Yanase, Kazunari Komenou
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Patent number: 4462087Abstract: Ion-implanted bubble device comprises a magnetic layer in which bubble propagation paths are formed by ion-implantation. The bubble propagation path has an inside turn including a cusp of which the summit deviates toward a direction of bubble propagation with respect to a cusp center line. Such a bubble propagation path permits the ion-implanted bubble device adopting a folded minor loop organization to be realized.Type: GrantFiled: February 22, 1983Date of Patent: July 24, 1984Assignee: Fujitsu LimitedInventors: Yoshio Satoh, Makoto Ohashi, Tsutomu Miyashita, Kazuo Matsuda, Kazunari Komenou
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Patent number: 4445200Abstract: A current stretch detection method for a bubble device in which bubbles are written at least one bit apart. A stretch pulse is applied to a stretch conductor so that when a bubble is detected, it is maintained stretched, even though the bubble following it has moved one bit. Preferably the stretch pulse is of a convex-shape. A bubble device has a hairpin stretch conductor and a detecting element disposed centrally in the conductor. The terminal of the detecting element on the higher potential side is arranged so that it does not cross the stretch conductor. The contiguous propagation pattern is provided with a notch at a position in which the stretch conductor is located.Type: GrantFiled: September 18, 1981Date of Patent: April 24, 1984Assignee: Fujitsu LimitedInventors: Makoto Ohashi, Kazunari Komenou, Tsutomu Miyashita, Kazuo Matsuda, Yoshio Satoh
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Patent number: 4434476Abstract: A magnetic bubble memory device includes: a magnetic layer with a first region having an easy axis of magnetization extending in a certain direction and a second region surrounding the first region and having an easy axis of magnetization substantially perpendicular to that of the first region, said first region defining a plurality of bubble propagation patterns; and a replicate gate with a stretch conductor pattern, to which an electric current is applied so as to stretch a bubble between said propagation patterns, and a cutting pattern formed in the second region between the propagation patterns and adapted to lower the bubble collapse field so as to cut the stretched domain. The replicate gate is operated by applying an operating current pulse to the stretch conductor pattern, said operating pulse including a stretch pulse for stretching the bubble and a cut pulse, following the stretch pulse, for cutting the stretched domain.Type: GrantFiled: August 17, 1982Date of Patent: February 28, 1984Assignee: Fujitsu LimitedInventors: Kazuo Matsuda, Makoto Ohashi, Yoshio Satoh, Tsutomu Miyashita, Kazunari Komenou
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Patent number: 4415988Abstract: A magnetic bubble memory device comprises: a magnetic layer which has a first region having the easy axis of magnetization extending in a certain direction and a second region surrounding said first region and having the easy axis of magnetization substantially perpendicular to that of the first region, said first region defining at least one major loop pattern for propagation of information bubbles and a plurality of minor loop patterns for storage of information bubbles; and an electrical conductor pattern deposited on said magnetic layer in a region in which the major loop pattern and the minor loop patterns are opposed to each other, thereby constructing a transfer gate. The major loop pattern is provided, at the portions thereof substantially opposed to the ends of the minor loop patterns in the transfer gate, with gaps through which the bubbles are transferred between the major loop pattern and the minor loop patterns. The transfer gate is driven by means of a convex-shaped pulse of transfer current.Type: GrantFiled: July 14, 1981Date of Patent: November 15, 1983Assignee: Fujitsu LimitedInventors: Kazunari Komenou, Tsutomu Miyashita, Makoto Ohashi