Akihisa Tomita

Person

Ibaraki, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Transmitting device, receiving device, quantum key distribution met...
- Patent number 11,502,831
- Issue date Nov 15, 2022
- NEC Corporation
- Ken-ichiro Yoshino
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Quantum cryptographic key output apparatus, quantum cryptographic k...
- Patent number 11,362,817
- Issue date Jun 14, 2022
- National University Corporation Hokkaido University
- Akihisa Tomita
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Random number sequence generation apparatus, quantum encryption tra...
- Patent number 11,057,201
- Issue date Jul 6, 2021
- National University Corporation Hokkaido University
- Akihisa Tomita
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Time-bin polarization format exchange technique for entangled optic...
- Patent number 8,509,446
- Issue date Aug 13, 2013
- National Institute of Information and Communications Technology
- Mikio Fujiwara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Communication system and communication method using the same
- Patent number 7,974,540
- Issue date Jul 5, 2011
- Japan Science and Technology Agency
- Akihisa Tomita
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Cryptographic key distribution method and apparatus thereof
- Patent number 6,895,092
- Issue date May 17, 2005
- NEC Corporation
- Akihisa Tomita
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Quantum key distribution method and apparatus
- Patent number 6,678,379
- Issue date Jan 13, 2004
- NEC Corporation
- Dominic Mayers
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Single photon generating apparatus
- Patent number 6,665,486
- Issue date Dec 16, 2003
- NEC Corporation
- Akihisa Tomita
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Quantum circuit
- Patent number 6,444,999
- Issue date Sep 3, 2002
- NEC Corporation
- Akihisa Tomita
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Semiconductor laser
- Patent number 6,014,394
- Issue date Jan 11, 2000
- NEC Corporation
- Akihisa Tomita
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Semiconductor laser
- Patent number 5,859,865
- Issue date Jan 12, 1999
- NEC Corporation
- Akihisa Tomita
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Quantum-well type semiconductor laser device having multi-layered q...
- Patent number 5,642,372
- Issue date Jun 24, 1997
- NEC Corporation
- Akihisa Tomita
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Multiple quantum well semiconductor laser
- Patent number 5,559,820
- Issue date Sep 24, 1996
- NEC Corporation
- Akitaka Kimura
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Semiconductor laser
- Patent number 5,351,254
- Issue date Sep 27, 1994
- NEC Corporation
- Akihisa Tomita
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Avalanche photodiode
- Patent number 4,982,255
- Issue date Jan 1, 1991
- NEC Corporation
- Akihisa Tomita
- H01 - BASIC ELECTRIC ELEMENTS

Patents Applicationslast 30 patents

Information Patent Application
RECEPTION DEVICE, QUANTUM KEY DISTRIBUTION SYSTEM, AND METHOD FOR D...
- Publication number 20240405977
- Publication date Dec 5, 2024
- NEC Corporation
- Ken-ichiro YOSHINO
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
CALIBRATION METHOD FOR PHASE MODULATOR, CALIBRATION METHOD FOR BALA...
- Publication number 20240337868
- Publication date Oct 10, 2024
- National Institute of Information and Communications Technology
- Mikio FUJIWARA
- G02 - OPTICS
Information Patent Application
RECEPTION DEVICE, QUANTUM KEY DISTRIBUTION SYSTEM, AND METHOD FOR D...
- Publication number 20240089093
- Publication date Mar 14, 2024
- NEC Corporation
- Ken-ichiro YOSHINO
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
PHOTON DETECTION DEVICE, RECEPTION DEVICE, QUANTUM KEY DISTRIBUTION...
- Publication number 20240080184
- Publication date Mar 7, 2024
- NEC Corporation
- Ken-ichiro YOSHINO
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
TRANSMITTING DEVICE, RECEIVING DEVICE, QUANTUM KEY DISTRIBUTION MET...
- Publication number 20190245685
- Publication date Aug 8, 2019
- NEC Corporation
- Ken-ichiro YOSHINO
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
QUANTUM CRYPTOGRAPHIC KEY OUTPUT APPARATUS, QUANTUM CRYPTOGRAPHIC K...
- Publication number 20190190707
- Publication date Jun 20, 2019
- National University Corporation Hokkaido University
- Akihisa TOMITA
- G02 - OPTICS
Information Patent Application
RANDOM NUMBER SEQUENCE GENERATION APPARATUS, QUANTUM ENCRYPTION TRA...
- Publication number 20190044713
- Publication date Feb 7, 2019
- National University Corporation Hokkaido University
- Akihisa TOMITA
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
TIME-BIN POLARIZATION FORMAT EXCHANGE TECHNIQUE FOR ENTANGLED OPTIC...
- Publication number 20110170695
- Publication date Jul 14, 2011
- National Institute of Information and Communications Technology
- Mikio FUJIWARA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
BLIND SIGNATURE METHOD AND ITS SYSTEM
- Publication number 20090031137
- Publication date Jan 29, 2009
- NEC CORORATION
- Satoshi Ishizaka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Communication system and communication method using the same
- Publication number 20070110242
- Publication date May 17, 2007
- Japan Science and Technology Agency
- Akihisa Tomita
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Quantum cryptography multi-node network system
- Publication number 20030002674
- Publication date Jan 2, 2003
- NEC Corporation
- Yoshihiro Nambu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Quantum circuit
- Publication number 20020030186
- Publication date Mar 14, 2002
- NEC Corporation
- Akihisa Tomita
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Cryptographic key distribution method and apparatus thereof
- Publication number 20020025041
- Publication date Feb 28, 2002
- NEC Corporation
- Akihisa Tomita
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Single photon generating apparatus
- Publication number 20010016095
- Publication date Aug 23, 2001
- Akihisa Tomita
- B82 - NANO-TECHNOLOGY

Akihisa Tomita

Person

Patents Grantslast 30 patents

Transmitting device, receiving device, quantum key distribution met...

Quantum cryptographic key output apparatus, quantum cryptographic k...

Random number sequence generation apparatus, quantum encryption tra...

Time-bin polarization format exchange technique for entangled optic...

Communication system and communication method using the same

Cryptographic key distribution method and apparatus thereof

Quantum key distribution method and apparatus

Single photon generating apparatus

Quantum circuit

Semiconductor laser

Semiconductor laser

Quantum-well type semiconductor laser device having multi-layered q...

Multiple quantum well semiconductor laser

Semiconductor laser

Avalanche photodiode

Patents Applicationslast 30 patents

RECEPTION DEVICE, QUANTUM KEY DISTRIBUTION SYSTEM, AND METHOD FOR D...

CALIBRATION METHOD FOR PHASE MODULATOR, CALIBRATION METHOD FOR BALA...

RECEPTION DEVICE, QUANTUM KEY DISTRIBUTION SYSTEM, AND METHOD FOR D...

PHOTON DETECTION DEVICE, RECEPTION DEVICE, QUANTUM KEY DISTRIBUTION...

TRANSMITTING DEVICE, RECEIVING DEVICE, QUANTUM KEY DISTRIBUTION MET...

QUANTUM CRYPTOGRAPHIC KEY OUTPUT APPARATUS, QUANTUM CRYPTOGRAPHIC K...

RANDOM NUMBER SEQUENCE GENERATION APPARATUS, QUANTUM ENCRYPTION TRA...

TIME-BIN POLARIZATION FORMAT EXCHANGE TECHNIQUE FOR ENTANGLED OPTIC...

BLIND SIGNATURE METHOD AND ITS SYSTEM

Communication system and communication method using the same

Quantum cryptography multi-node network system

Quantum circuit

Cryptographic key distribution method and apparatus thereof

Single photon generating apparatus