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For the Inventor, By the Inventor

Tokyo, Japan

Mitsubishi Kasei Corporation

Calculating rank
USPTO Granted Patents = 499


Trademarks = 3

Forward Citations = 5,201

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906 inventors (with patents filed for the assignee):

goldMedal Yasuhiro Morinaka (20 out of 34 patents)

silverMedal Akihiro Tobe (15 out of 37 patents)

bronzeMedal Yukichi Murata (15 out of 38 patents)

4.  Hitoshi Ono (14 out of 42 patents)

5.  Keiichi Sato (13 out of 79 patents)

6.  Yasuo Oguri (13 out of 30 patents)

7.  Shuichi Maeda (10 out of 21 patents)

8.  Hisao Takayanagi (9 out of 18 patents)

9.  Yoshinori Suga (9 out of 28 patents)

10.  Yoshio Hayashi (9 out of 12 patents)

11.  Shigenori Otsuka (9 out of 16 patents)

12.  Mamoru Nozomi (9 out of 22 patents)

13.  Yasunori Kitano (9 out of 12 patents)

14.  Tsuyoshi Ito (8 out of 38 patents)

15.  Kenji Shimoyama (8 out of 29 patents)


Core Competencies:
Compound Semiconductor
Epitaxial Wafer
Gallium Arsenide Phosphide
Manufacturing Method
Semiconductor Device
P-Type Electrode
Fabrication Process
Surface Protrusions
Magnetic Disc
Hepatocyte Growth Factor
Optical Recording Medium
Anti-Solid Tumor Agents

499 patents:

1. 6139869 - Human monoclonal antibody specifically binding to surface antigen of (2000-10-31),
2. 5868834 - Method of manufacturing a group II-VI compound semiconductor (1999-02-09),
3. 5846628 - Magnetic disc (1998-12-08),
4. 5827365 - Compound semiconductor and its fabrication (1998-10-27),
5. 5751026 - Epitaxial wafer of gallium arsenide phosphide (1998-05-12),
6. 5736506 - Method of inhibiting the degradation of hepatocyte growth factor (1998-04-07),
7. 5665502 - Electrophotographic photoreceptor and method for producing the (1997-09-09),
8. 5660628 - Method of manufacturing semiconductor epitaxial wafer (1997-08-26),
9. 5644165 - Semiconductor device having a p-type ohmic electrode structure (1997-07-01),
10. 5618448 - Glass substrate having surface protrusions for use as a magnetic disc (1997-04-08),
11. 5584801 - Wound covering (1996-12-17),
12. 5583054 - Determination and detection of antibody and its immunoglobulin class (1996-12-10),
13. 5576400 - Process for producing olefin polymer (1996-11-19),
14. 5557016 - Process for producing alkadienols (1996-09-17),
15. 5554831 - Sound absorbing member (1996-09-10),
Company Overview
Mitsubishi Kasei Corporation, headquartered in Tokyo, specializes in the development and manufacturing of advanced compound semiconductors. The company focuses on key technologies such as epitaxial wafers and gallium arsenide phosphide, which are essential for high-performance semiconductor devices. Their expertise extends to innovative fabrication processes and the creation of p-type electrodes, positioning them as a leader in the semiconductor industry. Mitsubishi Kasei is committed to advancing semiconductor technology to meet the evolving demands of various applications.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

499 Patents

#187 in Tokyo

#382 in Japan

#1,943 in the World

Tokyo, JP
Tokyo, Japan

Mitsubishi Kasei Corporation

Forward Citations = 5,201

906 inventors:

goldMedal Yasuhiro Morinaka (20 out of 34 patents)

silverMedal Akihiro Tobe (15 out of 37 patents)

bronzeMedal Yukichi Murata (15 out of 38 patents)

4.  Hitoshi Ono (14 out of 42 patents)

5.  Keiichi Sato (13 out of 79 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Mitsubishi Kasei Corporation. Retrieved from https://idiyas.com/company/mitsubishi-kasei

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

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]
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