EPO Patents = 2

Forward Citations = 25

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6 inventors (with patents filed for the assignee):

Isao Akutsu (3 out of 4 patents)

Masayuki Ozaki (3 out of 3 patents)

Akihisa Inoue (1 out of 64 patents)

4. Masaki Nagata (1 out of 1 patent)

5. Motohiro Kameyama (1 out of 1 patent)

6. Yoshihiko Yokoyama (1 out of 1 patent)

7. Inoue Akihisa (1 patent)

8. Akihisa Inoue (30 patents)

9. Yokoyama Yoshihiko (0 patent)

10. Kawai Yoshiaki (0 patent)

11. Kameyama Motohiro (0 patent)

12. Masaki Nagata (0 patent)

13. Yoshihiko Yokoyama (0 patent)

4 patents: Sort by Forward Citations

1. 8651169 - Arc melting furnace apparatus (2014-02-18),

2. 5836754 - Screw fluid machine and screw gear used in the same (1998-11-17),

3. 5829957 - Screw fluid machine and screw gear used in the same (1998-11-03),

4. 5674063 - Screw fluid machine and screw gear used in the same (1997-10-07),

Company Overview

Diavac Limited is a leading provider of vacuum solutions for various industrial applications. With years of experience in the field, we offer a wide range of vacuum pumps, systems, and accessories to meet the needs of our customers. Our products are known for their high quality, reliability, and efficiency, making us a trusted partner for many industries worldwide.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

4 Patents

#1 in Yachiyo

#7,588 in Japan

Yachiyo, Japan

Diavac Limited

Forward Citations = 25

6 inventors:

Isao Akutsu (3 out of 4 patents)

Masayuki Ozaki (3 out of 3 patents)

Akihisa Inoue (1 out of 64 patents)

4. Masaki Nagata (1 out of 1 patent)

5. Motohiro Kameyama (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Diavac Limited. Retrieved from https://idiyas.com/company/diavac

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]

2 patents (EPO):

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]