Chang Qing Xu

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Wavelength conversion device employing non-diffracting beam
- Patent number 5,963,359
- Issue date Oct 5, 1999
- Oki Electric Industry Co., Ltd.
- Keisuke Shinozaki
- G02 - OPTICS
Information Patent Grant
Wavelength conversion apparatus with improved efficiency, easy adju...
- Patent number 5,946,129
- Issue date Aug 31, 1999
- Oki Electric Industry Co., Ltd.
- Chang-Qing Xu
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Wavelength conversion device employing Bessel beams with parallel p...
- Patent number 5,943,161
- Issue date Aug 24, 1999
- Oki Electric Industry Co., Ltd.
- Keisuke Shinozaki
- G02 - OPTICS
Information Patent Grant
Optical-wavelength interchanger element and optical-wavelength inte...
- Patent number 5,786,916
- Issue date Jul 28, 1998
- Oki Electric Industry Co., Ltd.
- Hideaki Okayama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Wavelength conversion device and wavelength conversion method
- Patent number 5,734,494
- Issue date Mar 31, 1998
- Oki Electric Industry Co., Ltd.
- Chang Qing Xu
- G02 - OPTICS