Company Filing History:

22 out of 10,264

Sumitomo Electric Industries, Limited

patents

2 out of 1,430

Agency of Industrial Science and Technology

patents

1 out of 4

Kozo Iizuka, Director General, Agency of Industrial Science and

patents

Years Active: 1976-2003

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25 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 6646164 - Triphenylamine derivative and organic electroluminescence device comprising the same (2003-11-11),

2. 5821003 - Organic electroluminescent device (1998-10-13),

3. 5817837 - Tetrathiafulvalene derivative precursors, tetrathiafulvalene (1998-10-06),

4. 5792567 - Triazole derivatives and organic electroluminescent devices produced (1998-08-11),

5. 5637260 - Process for producing stabilized carbon cluster conducting material (1997-06-10),

6. 5635455 - Process for producing stabilized carbon cluster conducting or (1997-06-03),

7. 5616728 - Organic charge transfer complex (1997-04-01),

8. 5589281 - Stabilized carbon cluster conducting or superconducting material, (1996-12-31),

9. 5538763 - Method of preparing carbon cluster film having electrical conductivity (1996-07-23),

10. 5501778 - Organic superconductor and process for producing the same (1996-03-26),

11. 5380595 - Carbon cluster film having electrical conductivity and method of (1995-01-10),

12. 5312805 - Organic superconductive material and process for producing the same (1994-05-17),

13. 5252546 - Process for producing an organic superconductive material (1993-10-12),

14. 5229845 - Electroconductive thin film of organic charge transfer complexes of (1993-07-20),

15. 5082687 - Process for producing organic electrical conductor (1992-01-21),

Title: **Yoshinobu Ueba: A Pioneer in Organic Electroluminescence**

Introduction

Yoshinobu Ueba, an accomplished inventor based in Osaka, Japan, has made significant contributions to the field of organic electroluminescence. With an impressive portfolio of 25 patents, his work has pushed the boundaries of technology in display and lighting industries.

Latest Patents

Among his most recent innovations is the "Triphenylamine derivative and organic electroluminescence device comprising the same." This patent covers an organic electroluminescent device designed with a hole-transport layer, where the hole-transport material is skillfully dispersed within a resin binder that has a high glass transition temperature of no less than 170°C. The remarkable properties of this device include superior durability and enhanced hole-transport capabilities, resulting in outstanding luminous efficiency, luminance, and stability.

Career Highlights

Yoshinobu Ueba's career has been marked by his tenure at notable institutions like Sumitomo Electric Industries, Limited and the Agency of Industrial Science and Technology. His expertise in organic materials and electroluminescent devices has paved the way for innovation in various applications, from consumer electronics to advanced lighting solutions.

Collaborations

Throughout his career, Ueba has collaborated with distinguished colleagues, including Nobuyuki Okuda and Takashi Uemura. These partnerships have fostered an environment of creativity and experimentation, further enhancing the innovative outcomes of their combined efforts.

Conclusion

Yoshinobu Ueba stands out as a visionary inventor whose work in organic electroluminescence has set new standards in the industry. His commitment to advancing technology through innovative patents continues to inspire future generations of inventors and researchers alike.

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