Company Filing History:

18 out of 21,351

Mitsubishi Denki Kabushiki Kaisha

patents

1 out of 1,530

Mitsubishi Materials Corporation

patents

where one patent can have more than one assignee

Years Active: 1991-1997

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18 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5697219 - Cryogenic refrigerator (1997-12-16),

2. 5583472 - Superconductive magnet (1996-12-10),

3. 5487272 - Cryogenic refrigerator (1996-01-30),

4. 5447033 - Multi-stage cold accumulation type refrigerator and cooling device (1995-09-05),

5. 5398512 - Cold accumulation type refrigerating machine (1995-03-21),

6. 5398511 - Regenerative refrigerator (1995-03-21),

7. 5387252 - Cryogenic refrigerator (1995-02-07),

8. 5379600 - Superconducting magnet and method for assembling the same (1995-01-10),

9. 5365743 - Multi-stage cold accumulation type refrigerator and cooling device (1994-11-22),

10. 5293752 - Multi-stage cold accumulation type refrigerator and cooling device (1994-03-15),

11. 5293749 - Multi-stage cold accumulation type refrigerator and cooling device (1994-03-15),

12. 5251456 - Multi-stage cold accumulation type refrigerator and cooling device (1993-10-12),

13. 5207981 - Heat reserving materials usuable at very low temperatures (1993-05-04),

14. 5154063 - Multi-stage cold accumulation type refrigerator and cooling device (1992-10-13),

15. 5144810 - Multi-stage cold accumulation type refrigerator and cooling device (1992-09-08),

Title: The Innovative Contributions of Masashi Nagao

Introduction

Masashi Nagao is a prominent inventor based in Amagasaki, Japan. He has made significant contributions to the field of cryogenics and superconductivity, holding a total of 18 patents. His work focuses on enhancing the efficiency and performance of refrigeration systems and superconductive magnets.

Latest Patents

One of Nagao's latest inventions is a cryogenic refrigerator designed to prevent deterioration in refrigerating performance while achieving high efficiency. This innovative refrigerator includes a first compressor, a first expander with an accumulator made from a rare earth alloy or helium, a sub-expansion space for further expansion of the working fluid, and a second compressor for compressing the returning working fluid. Another notable patent is for a superconductive magnet, which aims to reduce the size of the magnetic device while improving refrigerating performance. This design features a cylinder for fastening the refrigerator, which interfaces with a helium chamber and a vacuum chamber, along with a three-stage regenerative refrigerator that is insulated to prevent heat convection.

Career Highlights

Throughout his career, Masashi Nagao has worked with notable companies such as Mitsubishi Electric Corporation and Mitsubishi Materials Corporation. His experience in these organizations has allowed him to develop and refine his innovative ideas in cryogenics and superconductivity.

Collaborations

Nagao has collaborated with esteemed colleagues, including Hideto Yoshimura and Takashi Inaguchi, contributing to the advancement of technology in his field.

Conclusion

Masashi Nagao's contributions to cryogenics and superconductivity are marked by his innovative patents and collaborations. His work continues to influence the development of efficient refrigeration systems and superconductive technologies.

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