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For the Inventor, By the Inventor

Tokyo, Japan

Baldwin-Japan Ltd.

Calculating rank
USPTO Granted Patents = 27

% Expired Patents = 22.2


Forward Citations = 113

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28 inventors (with patents filed for the assignee):

goldMedal Akira Hara (13 out of 23 patents)

silverMedal Hideo Oyaizu (8 out of 8 patents)

bronzeMedal Hiraku Onuma (6 out of 6 patents)

4.  Yoshio Tsukamoto (5 out of 5 patents)

5.  Akira Kurachi (4 out of 5 patents)

6.  Shigeo Isobe (4 out of 4 patents)

7.  Shigeo Yamamoto (3 out of 3 patents)

8.  Takayuki Goto (3 out of 3 patents)

9.  Ryozo Suzuki (2 out of 2 patents)

10.  C Robert Gasparrini (2 out of 9 patents)

11.  Takayuku Goto (2 out of 2 patents)

12.  Tomokatsu Mukae (2 out of 2 patents)

13.  Toshisaburo Takagi (2 out of 3 patents)

14.  Yuuichi Suzuki (2 out of 2 patents)

15.  Takeo Onda (2 out of 2 patents)


Core Competencies:
Printed Paper Inspection
Pressure Pad
Cylinder Cleaning
Optical System
Web Anti-Wrap
Dampening Water Feeding
Color Sensor
Cleaning Machine
Automatic Web Guide
Printing Plate Identification
Fabric Cleaning

27 patents:

1. 7570788 - Printed paper inspecting method and apparatus (2009-08-04),
2. 7287297 - Pressure pad for cleaning fabric (2007-10-30),
3. 7219605 - Cylinder cleaning apparatus (2007-05-22),
4. 7034928 - Reading apparatus (2006-04-25),
5. 6823789 - Cylinder cleaning device and cylinder cleaning fabric used therefor (2004-11-30),
6. 6546591 - Pressure pad and cylinder cleaning apparatus (2003-04-15),
7. 6395361 - Package opening method and apparatus (2002-05-28),
8. 6381020 - Optical system (2002-04-30),
9. 6332238 - Cylinder cleaning device (2001-12-25),
10. 6253413 - Pressure pad and cylinder cleaning apparatus (2001-07-03),
11. 6219879 - Cylinder cleaning device (2001-04-24),
12. 6176183 - Cylinder cleaning device with shaft end distinguishing means (2001-01-23),
13. 6161477 - Web anti-wrap device for web printing press (2000-12-19),
14. 6138563 - Dampening water feeding method and apparatus (2000-10-31),
15. 6115512 - Optical color sensor and color print inspecting apparatus (2000-09-05),
Company Overview
Baldwin-Japan Ltd. is a prominent player in the field of advanced filtration and separation technologies. The company specializes in developing innovative solutions for various industries, including automotive, aerospace, and industrial applications. With a strong focus on research and development, Baldwin-Japan is dedicated to enhancing efficiency and sustainability through its cutting-edge products. The organization is headquartered in Tokyo, Japan, and serves a diverse clientele, leveraging its expertise to address complex challenges in fluid management and air filtration.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

27 Patents

#1,138 in Tokyo

#2,459 in Japan

#24,046 in the World

Tokyo, JP
Tokyo, Japan

Baldwin-Japan Ltd.

Forward Citations = 113

28 inventors:

goldMedal Akira Hara (13 out of 23 patents)

silverMedal Hideo Oyaizu (8 out of 8 patents)

bronzeMedal Hiraku Onuma (6 out of 6 patents)

4.  Yoshio Tsukamoto (5 out of 5 patents)

5.  Akira Kurachi (4 out of 5 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Baldwin-Japan Ltd.. Retrieved from https://idiyas.com/company/baldwin-japan

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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