Masahiro Tsubokawa

This inventor holds 15 USPTO granted patents, primarily in Refrigeration Compressors. Top assignee: Matsushita Electric Industrial Co., Ltd.. Active years: 1997-2003.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masahiro Tsubokawa. Retrieved from https://idiyas.com/inventor/masahiro-tsubokawa

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Calculating rank

USPTO Granted Patents = 15

% Patents Active = 100.0

Average Co-Inventor Count = 2.8

ph-index = 8

Forward Citations = 168(Granted Patents)

Location History:

Takefu, JP (1997 - 1999)
Kusatsu, JP (1997 - 2001)
Shiga, JP (2003)

Company Filing History:

15 out of 27,375

Matsushita Electric Industrial Co., Ltd.

patents

Years Active: 1997-2003

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Areas of Expertise:

Hermetic Motor Compressor

Scroll Compressor

Gear Pump

Refrigerant Compressor

Insulation Testing

Thrust Bearing

Nondestructive Testing

Back Pressure Partitioning

Surge Testing

Electrically-Operated

Sealed-Type Compressor

Refrigeration Machine

15 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 6553645 - Hermetic motor compressor and method assembling the same (2003-04-29),

2. 6299424 - Sliding member and refrigerating compressor using the same (2001-10-09),

3. 6227828 - Gear pump for use in an electrically-operated sealed compressor (2001-05-08),

4. 6176691 - Refrigerant compressor (2001-01-23),

5. 6116877 - Gear pump for use in an electrically-operated sealed compressor (2000-09-12),

6. 6053715 - Scroll type compressor (2000-04-25),

7. 6039551 - Gear pump for use in an electrically-operated sealed compressor (2000-03-21),

8. 5963410 - Insulation testing method and apparatus therefor (1999-10-05),

9. 5867029 - Method of nondestructive insulation test and a nondestructive insulation (1999-02-02),

10. 5848883 - Scroll compressor having a back pressure partitioning member (1998-12-15),

11. 5704122 - Sealed-type scroll compressor and assembling method therefor (1998-01-06),

12. 5695326 - Compressor for a refrigeration machine having a thrust bearing (1997-12-09),

13. 5632610 - Sealed-type scroll compressor with relatively shifted scrolls based on (1997-05-27),

14. 5594348 - Surge testing method in decompressed atmosphere for a small-size (1997-01-14),

15. 5591018 - Hermetic scroll compressor having a pumped fluid motor cooling means and (1997-01-07),

Title: Innovations of Masahiro Tsubokawa

Introduction

Masahiro Tsubokawa is a prominent inventor based in Kusatsu, Japan. He has made significant contributions to the field of engineering, particularly in the development of advanced motor compressor technologies. With a total of 15 patents to his name, Tsubokawa's work has had a substantial impact on the industry.

Latest Patents

Tsubokawa's latest patents include innovative designs such as the hermetic motor compressor and a method for assembling the same. This invention features a motor stator that is fixed to a body shell by shrinkage fit with a large fitting margin. The compression mechanism is then shrinkage fit with a small fitting margin and welded thereafter. Additionally, he has developed a sliding member and refrigerating compressor that utilizes specific sliding elements to enhance performance. These elements resist sticking to aluminum-base components and exhibit excellent wear resistance, ensuring longevity and efficiency in refrigeration applications.

Career Highlights

Throughout his career, Tsubokawa has been associated with Matsushita Electric Industrial Co., Ltd., where he has played a crucial role in advancing technology in the field of compressors. His innovative approaches have led to the development of products that meet the evolving needs of the market.

Collaborations

Tsubokawa has worked alongside notable colleagues such as Toshiharu Yasu and Yoshiharu Takeuchi. Their collaborative efforts have contributed to the success of various projects and innovations within the company.

Conclusion

Masahiro Tsubokawa's contributions to the field of engineering and his innovative patents have established him as a key figure in the industry. His work continues to influence the development of advanced technologies in motor compressors and refrigeration systems.

Profile summary based on public USPTO records.

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]