Inventor
Ryota Akiyama
Inventor
Kawasaki, JP
Overview
Patents· 43 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G06Fprimary
G06FElectric digital data processing32%
G11BInformation storage based on relative movement between record carrier and transducer19%
H04LTransmission of digital information, e.g. telegraphic communication17%
G06QInformation and communication technology [ict] specially adapted for administrative, commercial, financial, managerial or supervisory purposes8%
H04NPictorial communication, e.g. television4%
Y04SSystems integrating technologies related to power network operation, communication or information technologies for improving the electrical power generation, transmission, distribution, management or usage, i.e. smart grids4%
G07FCoin-freed or like apparatus3%
H04KSecret communication3%
H04WWireless communication networks3%
G04RRadio-controlled time-pieces1%
PatentTitleYear
8,021,964'Method of producing segmented chips'20117,961,871'Encryption process, encryption device, and computer-readable medium storing encryption program'20117,555,651'Time management apparatus and time management method'20097,512,801'Authentication system, authentication method, signing apparatus, signing method, certifying apparatus, certifying method, and a computer-readable recording medium with a program making a computer execute the method recording therein'2009RE040547'Software reproduction apparatus'20087,421,078'Valid medium management system'2008RE039802'Storage medium for preventing an irregular use by a third party'20077,257,393'Method and apparatus for time calibration'20077,154,824'Storage apparatus'20067,013,392'File processing unit'20067,010,127'Cryptographic communication method, file access system and recording medium'20067,000,114'Apparatus to create and/or verify digital signatures having a secure time element and an identifier of the apparatus'20066,944,734'Storage apparatus and access control method'20056,700,989'Device for generating, detecting, recording, and reproducing a watermarked moving image having a copy preventing capability and storage medium for storing program or the moving image'20046,636,970'Software encoding using a combination of two types of encoding and encoding type identification information'20036,460,137'Encryption processing system'20026,144,745'Method of and apparatus for retaining and verifying of data on recording medium'20006,067,640'System for management of software employing memory for processing unit with regulatory information, for limiting amount of use and number of backup copies of software'20005,832,210'Device and method for controlling communication'19985,822,771'System for management of software employing memory for processing unit with regulatory information, for limiting amount of use and number of backup copies of software'19985,812,661'Software reproduction apparatus'19985,812,663'Data reproducing device'19985,805,699'Software copying system'19985,796,824'Storage medium for preventing an irregular use by a third party'19985,787,179'Scrambling and descrambling of data with improved security'19985,784,464'System for and method of authenticating a client'19985,774,651'False statement detection system'19985,768,387'Key authentication method and key authentication apparatus'19985,737,413'Information distribution system wherein storage medium storing ciphered information is distributed'19985,737,415'Data management module, data reproduction management device and data reproduction management system'19985,680,453'Software delivery system, center device, relaying device and user terminal device'19975,623,548'Transformation pattern generating device and encryption function device'19975,584,022'Enciphered file sharing method'19965,555,304'Storage medium for preventing an illegal use by a third party'19965,539,825'Electronic cashless transaction system'19965,499,299'Modular arithmetic operation system'19965,440,631'Information distribution system wherein storage medium storing ciphered information is distributed'19955,428,684'Electronic cashless transaction system'19955,392,351'Electronic data protection system'19955,386,468'Method of registering identification number in personal communication terminal'19955,325,433'Encryption communication system'19945,065,430'Voice band splitting scrambler'19914,959,863'Secret speech equipment'1990Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1990–2009Patents assigned to FUJITSU LTD (40)· patent assignee history
1990–2011Based in Tokyo, JP· patent location history
1991–2011Based in Suginami-ku, JP· patent location history
1994–2009Based in Kawasaki, JP· patent location history
2006–2009Based in Kanagawa, JP· patent location history
2007Patents assigned to CITIZEN HOLDINGS CO LTD (1)· patent assignee history
2011Patents assigned to 3M INNOVATIVE PROPERTIES CO (1)· patent assignee history
2011Patents assigned to FUJITSU BROAD SOLUTION & CONSULTING INC (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| FUJITSU LTD | 40 | 1990–2009 |
| 3M INNOVATIVE PROPERTIES CO | 1 | 2011 |
| CITIZEN HOLDINGS CO LTD | 1 | 2007 |
| FUJITSU BROAD SOLUTION & CONSULTING INC | 1 | 2011 |
Locations
| Location | Patents | Span |
|---|---|---|
| Kawasaki, JP | 35 | 1994–2009 |
| Tokyo, JP | 4 | 1990–2011 |
| Suginami-ku, JP | 2 | 1991–2011 |
| Kanagawa, JP | 2 | 2006–2009 |