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Obara Corporation

USPTO Granted Patents = 48

% Expired Patents = 12.5

EPO Patents = 3

Trademarks = 4

Forward Citations = 284

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33 inventors (with patents filed for the assignee):

Shigeru Umeda (11 out of 11 patents)

Toshihiro Nishiwaki (11 out of 12 patents)

Tatsuo Morita (6 out of 73 patents)

4. Yoshio Sato (6 out of 10 patents)

5. Takehiro Izumi (4 out of 4 patents)

6. Teruzo Yamaguchi (4 out of 4 patents)

7. Kenji Hayafuji (3 out of 4 patents)

8. Hiroshi Obara (3 out of 12 patents)

9. Tsuyoshi Takatori (3 out of 3 patents)

10. Katuji Tanabe (3 out of 3 patents)

11. Masaki Kumagai (2 out of 16 patents)

12. Kenta Aoki (2 out of 3 patents)

13. Takashi Kanno (2 out of 2 patents)

14. Daisuke Higuchi (2 out of 2 patents)

15. Yasuhiro Obara (2 out of 2 patents)

Core Competencies:

Electrode Tip

Friction Stir Welding

Welding Control

Robot Welding

Welding Gun

Resistance Welding

Welding Transformer

Cooling System

Pressure Application

Tool Changer

Current Sensor

Metal Fittings

48 patents: Sort by Forward Citations

1. 12311460 - Replacing and holding device for electrode tip (2025-05-27),

2. 11203081 - Removal device of welding electrode tip (2021-12-21),

3. 9302343 - Process for spot-joining stacked metal foils (2016-04-05),

4. 7654435 - Rotary tool for friction stir spot welding and method of friction stir spot welding using the same (2010-02-02),

5. 7422140 - Friction stir spot joining device (2008-09-09),

6. 7383976 - Friction stir spot joining device (2008-06-10),

7. 7322509 - Friction stir spot joining device (2008-01-29),

8. 7105768 - Fixed type electrode tip take-out device (2006-09-12),

9. 7105767 - Fixed type electrode tip removal device (2006-09-12),

10. 6959228 - Method of protecting data stored in a memory of welding controller (2005-10-25),

11. 6813538 - Welding system (2004-11-02),

12. 6718837 - Driving unit for pressure application shaft in a welding apparatus (2004-04-13),

13. 6603228 - Driving unit of a welding equipment (2003-08-05),

14. 6252193 - X type electric welding machine (2001-06-26),

15. 6223971 - Driving unit of a welding equipment (2001-05-01),

Obara Corporation, headquartered in Tokyo, specializes in advanced welding technologies, focusing on areas such as welding robotics, friction stir welding, and resistance welding. The company is recognized for its innovative solutions in electrode tip management and welding control systems, enhancing efficiency and precision in manufacturing processes. With a commitment to advancing spot joining techniques and developing robust welding transformers, Obara plays a significant role in the automotive and industrial sectors, contributing to the evolution of modern welding practices.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

48 Patents

#814 in Tokyo

#1,754 in Japan

#14,536 in the World

Obara Corporation

Forward Citations = 284

33 inventors:

Shigeru Umeda (11 out of 11 patents)

Toshihiro Nishiwaki (11 out of 12 patents)

Tatsuo Morita (6 out of 73 patents)

4. Yoshio Sato (6 out of 10 patents)

5. Takehiro Izumi (4 out of 4 patents)

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