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Tetsutaro Kobayashi
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Tokyo, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Anonymous broadcast method, key exchange method, anonymous broadcas...
Patent number
12,034,862
Issue date
Jul 9, 2024
Nippon Telegraph and Telephone Corporation
Reo Yoshida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Anonymous broadcast method, key exchange method, anonymous broadcas...
Patent number
11,985,250
Issue date
May 14, 2024
Nippon Telegraph and Telephone Corporation
Reo Yoshida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Server device, communication terminal, communication system, and pr...
Patent number
11,902,421
Issue date
Feb 13, 2024
Nippon Telegraph and Telephone Corporation
Yuki Okano
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Chatbot system, information processing apparatus, information proce...
Patent number
11,882,208
Issue date
Jan 23, 2024
Nippon Telegraph and Telephone Corporation
Yusuke Iijima
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Message transmission system, communication terminal, server apparat...
Patent number
11,765,137
Issue date
Sep 19, 2023
Nippon Telegraph and Telephone Corporation
Yuki Okano
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Key exchange method and key exchange system
Patent number
11,677,543
Issue date
Jun 13, 2023
Nippon Telegraph and Telephone Corporation
Reo Yoshida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Terminal device, key distribution management device, server-client...
Patent number
11,516,195
Issue date
Nov 29, 2022
Nippon Telegraph and Telephone Corporation
Yuto Kawahara
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Key exchange device, key exchange system, key exchange method, and...
Patent number
11,483,145
Issue date
Oct 25, 2022
Nippon Telegraph and Telephone Corporation
Masahiro Matsui
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Communication device, server device, concealed communication system...
Patent number
11,451,518
Issue date
Sep 20, 2022
Nippon Telegraph and Telephone Corporation
Tetsutaro Kobayashi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Key distribution system, terminal device, key distribution method,...
Patent number
11,411,720
Issue date
Aug 9, 2022
Nippon Telegraph and Telephone Corporation
Yuki Okano
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Encrypted communication device, encrypted communication system, enc...
Patent number
11,388,001
Issue date
Jul 12, 2022
Nippon Telegraph and Telephone Corporation
Reo Yoshida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Key distribution system and method, key generation apparatus, repre...
Patent number
11,336,436
Issue date
May 17, 2022
Nippon Telegraph and Telephone Corporation
Reo Yoshida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Communication terminal, server apparatus, and program
Patent number
11,336,441
Issue date
May 17, 2022
Nippon Telegraph and Telephone Corporation
Yuki Okano
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Key exchange method and key exchange system
Patent number
11,258,588
Issue date
Feb 22, 2022
Nippon Telegraph and Telephone Corporation
Reo Yoshida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Encrypted message search method, message transmission/reception sys...
Patent number
11,223,472
Issue date
Jan 11, 2022
Nippon Telegraph and Telephone Corporation
Yuki Okano
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Communication terminals, server devices, and programs
Patent number
11,190,499
Issue date
Nov 30, 2021
Nippon Telegraph and Telephone Corporation
Yuki Okano
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Data sharing method, data sharing system, data sharing server, comm...
Patent number
11,177,949
Issue date
Nov 16, 2021
Nippon Telegraph and Telephone Corporation
Yuki Okano
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Authentication control system, server apparatus, client apparatus,...
Patent number
10,979,411
Issue date
Apr 13, 2021
Nippon Telegraph and Telephone Corporation
Tetsutaro Kobayashi
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Key device, key cloud system, decryption method, and program
Patent number
10,686,604
Issue date
Jun 16, 2020
Nippon Telegraph and Telephone Corporation
Tsunekazu Saito
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Data transmission and reception method and system
Patent number
10,673,629
Issue date
Jun 2, 2020
Nippon Telegraph and Telephone Corporation
Reo Yoshida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Key exchange method, key exchange system, communication device and...
Patent number
10,630,465
Issue date
Apr 21, 2020
Nippon Telegraph and Telephone Corporation
Tetsutaro Kobayashi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Leakage prevention apparatus, leakage prevention method and program
Patent number
10,546,140
Issue date
Jan 28, 2020
Nippon Telegraph and Telephone Corporation
Reo Yoshida
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Key exchange method, key exchange system, key device, terminal devi...
Patent number
10,419,213
Issue date
Sep 17, 2019
Nippon Telegraph and Telephone Corporation
Akira Nagai
G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information
Patent Grant
Proxy computing system, computing apparatus, capability providing a...
Patent number
10,361,841
Issue date
Jul 23, 2019
Nippon Telegraph and Telephone Corporation
Go Yamamoto
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Key exchange method, key exchange system, key distribution device,...
Patent number
10,355,856
Issue date
Jul 16, 2019
Nippon Telegraph and Telephone Corporation
Reo Yoshida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Proxy computing system, computing apparatus, capability providing a...
Patent number
10,313,106
Issue date
Jun 4, 2019
Nippon Telegraph and Telephone Corporation
Go Yamamoto
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Security system, management apparatus, permission apparatus, termin...
Patent number
10,275,960
Issue date
Apr 30, 2019
Nippon Telegraph and Telephone Corporation
Hitoshi Fuji
E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information
Patent Grant
Decoding apparatus, decoding capability providing apparatus, method...
Patent number
10,163,370
Issue date
Dec 25, 2018
Nippon Telegraph and Telephone Corporation
Reo Yoshida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Directory service device, client device, key cloud system, method t...
Patent number
10,033,711
Issue date
Jul 24, 2018
Nippon Telegraph and Telephone Corporation
Tomohide Yamamoto
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Proxy computing system, computing apparatus, capability providing a...
Patent number
9,960,906
Issue date
May 1, 2018
Nippon Telegraph and Telephone Corporation
Go Yamamoto
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
KEY EXCHANGE SYSTEM, TERMINAL, SERVER, KEY EXCHANGE METHOD, AND PRO...
Publication number
20240205206
Publication date
Jun 20, 2024
Nippon Telegraph and Telephone Corporation
Yuki OKANO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
KEY EXCHANGE SYSTEM, TERMINAL, SERVER, KEY EXCHANGE METHOD, AND PRO...
Publication number
20240129111
Publication date
Apr 18, 2024
Nippon Telegraph and Telephone Corporation
Yuki OKANO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
SCALAR MULTIPLICATION SYSTEM, SCALAR MULTIPLICATION APPARATUS, SCAL...
Publication number
20240061648
Publication date
Feb 22, 2024
Nippon Telegraph and Telephone Corporation
Yuto KAWAHARA
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
COMMUNICATION SYSTEM, INFORMATION PROCESSING APPARATUS, COMMUNICATI...
Publication number
20240056288
Publication date
Feb 15, 2024
Nippon Telegraph and Telephone Corporation
Keizo MURAKAMI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
ENCRYPTION APPARATUS, CYPHER COMMUNICATION SYSTEM, ENCRYPTION METHO...
Publication number
20240048362
Publication date
Feb 8, 2024
Nippon Telegraph and Telephone Corporation
Mana UENO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
CHATBOT SYSTEM, INFORMATION PROCESSING APPARATUS, INFORMATION PROCE...
Publication number
20220368519
Publication date
Nov 17, 2022
Nippon Telegraph and Telephone Corporation
Yusuke IIJIMA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
ANONYMOUS BROADCAST METHOD, KEY EXCHANGE METHOD, ANONYMOUS BROADCAS...
Publication number
20220337428
Publication date
Oct 20, 2022
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Reo YOSHIDA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
SERVER DEVICE, COMMUNICATION TERMINAL, COMMUNICATION SYSTEM, AND PR...
Publication number
20210391981
Publication date
Dec 16, 2021
Nippon Telegraph and Telephone Corporation
Yuki OKANO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
KEY EXCHANGE METHOD AND KEY EXCHANGE SYSTEM
Publication number
20210314146
Publication date
Oct 7, 2021
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Reo YOSHIDA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
COMMUNICATION TERMINAL, SERVER APPARATUS, AND PROGRAM
Publication number
20210184844
Publication date
Jun 17, 2021
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Yuki OKANO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
COMMUNICATION DEVICE, SERVER DEVICE, CONCEALED COMMUNICATION SYSTEM...
Publication number
20210126906
Publication date
Apr 29, 2021
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Tetsutaro KOBAYASHI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
ENCRYPTED COMMUNICATION DEVICE, ENCRYPTED COMMUNICATION SYSTEM, ENC...
Publication number
20210091946
Publication date
Mar 25, 2021
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Reo YOSHIDA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
KEY DISTRIBUTION SYSTEM, TERMINAL DEVICE, KEY DISTRIBUTION METHOD,...
Publication number
20210083853
Publication date
Mar 18, 2021
Nippon Telegraph and Telephone Corporation
Yuki OKANO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
DATA SHARING METHOD, DATA SHARING SYSTEM, DATA SHARING SERVER, COMM...
Publication number
20200374114
Publication date
Nov 26, 2020
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Yuki OKANO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
ANONYMOUS BROADCAST METHOD, KEY EXCHANGE METHOD, ANONYMOUS BROADCAS...
Publication number
20200358622
Publication date
Nov 12, 2020
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Reo YOSHIDA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
KEY EXCHANGE DEVICE, KEY EXCHANGE SYSTEM, KEY EXCHANGE METHOD, AND...
Publication number
20200274704
Publication date
Aug 27, 2020
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Masahiro MATSUI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
KEY EXCHANGE METHOD AND KEY EXCHANGE SYSTEM
Publication number
20200252208
Publication date
Aug 6, 2020
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Reo YOSHIDA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
KEY DISTRIBUTION SYSTEM AND METHOD, KEY GENERATION APPARATUS, REPRE...
Publication number
20200136813
Publication date
Apr 30, 2020
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Reo YOSHIDA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
MESSAGE TRANSMISSION SYSTEM, COMMUNICATION TERMINAL, SERVER APPARAT...
Publication number
20200084185
Publication date
Mar 12, 2020
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Yuki OKANO
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
COMMUNICATION TERMINALS, SERVER DEVICES, AND PROGRAMS
Publication number
20190238523
Publication date
Aug 1, 2019
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Yuki OKANO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
ENCRYPTED MESSAGE SEARCH METHOD, MESSAGE TRANSMISSION/RECEPTION SY...
Publication number
20190215158
Publication date
Jul 11, 2019
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Yuki OKANO
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
TERMINAL DEVICE, KEY DISTRIBUTION MANAGEMENT DEVICE, SERVER-CLIENT...
Publication number
20190124058
Publication date
Apr 25, 2019
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Yuto KAWAHARA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
AUTHENTICATION CONTROL SYSTEM, SERVER APPARATUS, CLIENT APPARATUS,...
Publication number
20180359234
Publication date
Dec 13, 2018
Nippon Telegraph and Telephone Corporation
Tetsutaro KOBAYASHI
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
KEY EXCHANGE METHOD, KEY EXCHANGE SYSTEM, KEY DISTRIBUTION DEVICE,...
Publication number
20180183583
Publication date
Jun 28, 2018
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Reo YOSHIDA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
DATA TRANSMISSION AND RECEPTION METHOD AND SYSTEM
Publication number
20180115414
Publication date
Apr 26, 2018
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Reo YOSHIDA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
KEY EXCHANGE METHOD, KEY EXCHANGE SYSTEM, KEY DEVICE, TERMINAL DEVI...
Publication number
20170373841
Publication date
Dec 28, 2017
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Akira NAGAI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
LEAKAGE PREVENTION APPARATUS, LEAKAGE PREVENTION METHOD AND PROGRAM
Publication number
20170372086
Publication date
Dec 28, 2017
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Reo YOSHIDA
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
PROXY COMPUTING SYSTEM, COMPUTING APPARATUS, CAPABILITY PROVIDING A...
Publication number
20170353296
Publication date
Dec 7, 2017
Nippon Telegraph and Telephone Corporation
Go Yamamoto
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
KEY EXCHANGE METHOD AND KEY EXCHANGE SYSTEM
Publication number
20170302445
Publication date
Oct 19, 2017
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Tetsutaro KOBAYASHI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
SECURITY SYSTEM, MANAGEMENT APPARATUS, PERMISSION APPARATUS, TERMIN...
Publication number
20170186255
Publication date
Jun 29, 2017
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Hitoshi FUJI
E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES