Patents by Inventor Tomoyasu Shimizu
Tomoyasu Shimizu 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: 6859855Abstract: A data processing device includes a read-only memory, a flash memory capable of modifying information stored therein and adding information thereto, a central processing unit performing data processing using information stored in the read-only memory and the flash memory, an information storage area provided in the flash memory for storing predetermined modifiable information among the information used by the central processing unit for data processing, an address storage area provided in the flash memory for storing at least the address of information stored in the information storage area, and an address-modification control unit for, after at least one of modification of modifiable information stored in the information storage area and addition of modifiable information to the information storage area is performed, performing modification of the address of the information stored in the address storage area.Type: GrantFiled: August 21, 2000Date of Patent: February 22, 2005Assignee: Murata Manufacturing Co., Ltd.Inventor: Tomoyasu Shimizu
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Publication number: 20040093459Abstract: A data processing device includes a read-only memory, a flash memory capable of modifying information stored therein and adding information thereto, a central processing unit performing data processing using information stored in the read-only memory and the flash memory, an information storage area provided in the flash memory for storing predetermined modifiable information among the information used by the central processing unit for data processing, an address storage area provided in the flash memory for storing at least the address of information stored in the information storage area, and an address-modification control unit for, after at least one of modification of modifiable information stored in the information storage area and addition of modifiable information to the information storage area is performed, performing modification of the address of the information stored in the address storage area or addition of the address of the information to the address storage area, whereby the information ofType: ApplicationFiled: November 5, 2003Publication date: May 13, 2004Applicant: Murata Manufacturing Co., Ltd.Inventor: Tomoyasu Shimizu
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Patent number: 6725351Abstract: A data communication device which includes a flash memory, a primary buffer region in the flash memory which has time-sequential information stored therein from earliest to, an auxiliary buffer region in the flash memory which receives and stores primary-buffer storage information to be stored in the primary buffer region during a first condition of the data communication device when the information stored in the primary buffer region is not allowed to be updated, and an information-storage control unit which, when the primary-buffer storage information is stored in the auxiliary buffer region and during a second condition of the data communication device when updating of the information in the primary buffer region is allowed, reads information having a size not more than the storage capacity of the primary buffer region from the information stored in said primary buffer region and the auxiliary buffer region, and which re-stores the information that has been read in the primary buffer region.Type: GrantFiled: August 9, 2000Date of Patent: April 20, 2004Assignee: Murata Manufacturing Co., Ltd.Inventor: Tomoyasu Shimizu
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Patent number: 6510316Abstract: The wireless communication apparatus has a flash memory in which a plurality of sectors are formed to make partitions so that at least two of the sectors are allocated for storing the positional record information. The positional-record information is stored in one of the at least two allocated sectors, whereas at least one of the remaining sectors are controlled so as to be used as an empty sector storing no information. When positional-record information for updating is given, the information is updated and stored in at least one of the remaining sectors, that is, in the aforementioned empty sector. After updating and storing of the information is completed, the information stored in the sector storing the pre-update positional-record information is eliminated.Type: GrantFiled: April 3, 2000Date of Patent: January 21, 2003Assignee: Murata Manufacturing Co., Ltd.Inventor: Tomoyasu Shimizu
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Publication number: 20020068553Abstract: The wireless communication apparatus has a flash memory in which a plurality of sectors are formed to make partitions so that at least two of the sectors are allocated for storing the positional record information. The positional-record information is stored in one of the at least two allocated sectors, whereas at least one of the remaining sectors are controlled so as to be used as an empty sector storing no information. When positional-record information for updating is given, the information is updated and stored in at least one of the remaining sectors, that is, in the aforementioned empty sector. After updating and storing of the information is completed, the information stored in the sector storing the pre-update positional-record information is eliminated.Type: ApplicationFiled: April 3, 2000Publication date: June 6, 2002Inventor: Tomoyasu Shimizu
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Patent number: 5673392Abstract: A method of executing communication programs in a modem apparatus. A plurality of communication programs used to perform data communication or facsimile communication are stored in an internal memory space (e.g., ROM) in a processor after they have been compressed. A communication program to be executed in ROM is decompressed and developed in a work area external to the processor (e.g., RAM). The developed communication program is then executed by the processor. The data decompression is performed according to an exclusive program decompression program or a program in the communication programs which is adapted to provide a data decompression function.Type: GrantFiled: April 26, 1995Date of Patent: September 30, 1997Assignee: Murata Mfg. Co., Ltd.Inventors: Tatsuya Nakashima, Tomoyasu Shimizu
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Patent number: 5427867Abstract: A substrate used for magnetic disk comprising s non-magnetic support in which a material for forming pits is formed on the surface, wherein the material for forming the surface pits comprises a low melting metal and has an island structure discontinuous in the direction within the plane at the surface of the non-magnetic support, thereby enabling to produce a magnetic disk of excellent magnetic property at high productivity, as well as a magnetic recording medium using such a substrate.Type: GrantFiled: June 3, 1994Date of Patent: June 27, 1995Assignee: Nippon Sheet Glass Co., Ltd.Inventors: Toshihiro Kogure, Tomoyasu Shimizu, Toshiyuki Sato, Shinya Katayama
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Patent number: 5113302Abstract: A magnetic recording medium having a durability improving, carbon protective film formed on a surface of a magnetic recording layer, which is in turn disposed on a substrate, and a lubricant coated on a surface of the carbon film remote from the substrate; wherein a coupling agent layer is disposed between the carbon protective film and the lubricant, so that the force of adhesion of the lubricant to the carbon film is greatly improved, thus producing a magnetic recording medium having excellent lubricity and wear resistance.Type: GrantFiled: November 20, 1989Date of Patent: May 12, 1992Assignee: Nippon Sheet Glass Co., Ltd.Inventors: Tomoyasu Shimizu, Yuichi Aoki, Shinya Kawakita
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Patent number: 5055359Abstract: In a magnetic recording medium having a layer of a perfluoroalkylpolyether-based liquid lubricant as an uppermost layer, the liquid lubricant has an atomic group including an aromatic ring at a terminal end of a perfluoropolyether main chain, and is coated on an inorganic oxide. Therefore, adhesion force of the lubricant is greatly improved, and interaction within the lubricant can be decreased, thus realizing a magnetic recording medium having excellent lubricity and wear resistance.Type: GrantFiled: February 20, 1991Date of Patent: October 8, 1991Assignee: Nippon Sheet Glass Co., Ltd.Inventors: Toshio Tsuno, Shinya Katayama, Shinya Kawakita, Tomoyasu Shimizu