Michitaka Sisido

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Noise removing apparatus using a microphone
- Patent number 5,740,262
- Issue date Apr 14, 1998
- NEC Corporation
- Toshio Yoshida
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Telephone set in which an echo signal is effectively cancelled in s...
- Patent number 5,699,423
- Issue date Dec 16, 1997
- NEC Corporation
- Toshio Yoshida
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Display control device for controlling brightness of a display inst...
- Patent number 5,617,112
- Issue date Apr 1, 1997
- NEC Corporation
- Toshio Yoshida
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Noise suppression of acoustic signal in telephone set
- Patent number 5,617,472
- Issue date Apr 1, 1997
- NEC Corporation
- Toshio Yoshida
- H04 - ELECTRIC COMMUNICATION TECHNIQUE