Forward Citations = 136

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10 inventors (with patents filed for the assignee):

Yasuyuki Harada (6 out of 7 patents)

Shigeyoshi Netsu (4 out of 7 patents)

Kazuhiko Shiba (2 out of 2 patents)

4. Mitsuru Nakada (1 out of 4 patents)

5. Hiroshi Amano (1 out of 1 patent)

6. Masaki Kameya (1 out of 1 patent)

7. Shouichi Miura (1 out of 1 patent)

8. Toda Masayuki (1 out of 1 patent)

9. Tadahiro Ohmi (1 out of 93 patents)

10. Tadahiro Ohmi (1 out of 53 patents)

7 patents: Sort by Forward Citations

1. 6050276 - Apparatus and method for cleaning a precision substrate (2000-04-18),

2. 6003527 - Cleaning apparatus and a cleaning method (1999-12-21),

3. 5985811 - Cleaning solution and cleaning method (1999-11-16),

4. 5927305 - Cleaning apparatus (1999-07-27),

5. 5733434 - Apparatus and method for cleaning semiconductor wafers (1998-03-31),

6. 5725753 - Apparatus and method for cleaning semiconductor wafers (1998-03-10),

7. 5186192 - Apparatus for cleaning silicon wafer (1993-02-16),

Company Overview

Pre-tech Co., Ltd. is a leading provider of innovative technology solutions for businesses worldwide. Specializing in cutting-edge software development, cybersecurity, and IT consulting services, we help our clients stay ahead of the competition and achieve their strategic goals. With a team of highly skilled professionals and a customer-centric approach, we are committed to delivering top-quality solutions that drive results.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

7 Patents

#2,288 in Tokyo

#5,459 in Japan

Tokyo, Japan

Pre-Tech Co., Ltd.

Forward Citations = 136

10 inventors:

Yasuyuki Harada (6 out of 7 patents)

Shigeyoshi Netsu (4 out of 7 patents)

Kazuhiko Shiba (2 out of 2 patents)

4. Mitsuru Nakada (1 out of 4 patents)

5. Hiroshi Amano (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Pre-Tech Co., Ltd.. Retrieved from https://idiyas.com/company/pre-tech-company

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]