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For the Inventor, By the Inventor

Osaka, Japan

Oohiro Works, Ltd.


USPTO Granted Patents = 66

% Expired Patents = 12.1

Forward Citations = 380

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10 inventors (with patents filed for the assignee):

goldMedal Nobuyuki Minami (32 out of 32 patents)

silverMedal Hirohisa Shimizu (16 out of 17 patents)

bronzeMedal Kazuo Ooyama (10 out of 10 patents)

4.  Toshiaki Kawakami (3 out of 3 patents)

5.  Toshiyuki Sato (3 out of 4 patents)

6.  Hideaki Miyoshi (2 out of 7 patents)

7.  Tetsuji Hatanaka (1 out of 2 patents)

8.  Yoshikazu Ishimura (1 out of 1 patent)

9.  Tadashi Ijichi (1 out of 1 patent)

10.  Yasuke Hirota (1 out of 1 patent)


Core Competencies:
Automatic Hair Washer
Hair Processing Accelerator
Beauty Chair
Hair Washing Apparatus
Facial Treatment Device
Pedestal Sink
Swivel Pedestal
Waterproof Sheet
Nail Table
Dressing Mirror
Barber Chair
Hair Treatment Device

66 patents:

1. 6761339 - Leg part for a barber or beauty chair (2004-07-13),
2. D489481 - Automatic hair washing machine (2004-05-05),
3. D488586 - Automatic hair washer (2004-04-14),
4. D488257 - Automatic hair washer (2004-04-07),
5. 6679908 - Facial treatment device (2004-01-20),
6. D482820 - Automatic hair washer (2003-11-26),
7. 6615418 - Automatic hair washer (2003-09-09),
8. 6609759 - Chair and stand for chair (2003-08-26),
9. 6604251 - Hair washing stand (2003-08-12),
10. D475158 - Hair washer (2003-05-28),
11. D474562 - Hair processing accelerator (2003-05-14),
12. 6526605 - Automatic hair washer (2003-03-04),
13. D468483 - Hair processing accelerator (2003-01-08),
14. 6463597 - Hair washing apparatus (2002-10-15),
15. D462423 - Pedestal sink for washing hair (2002-09-04),
Company Overview
Oohiro Works, Ltd. is a pioneering company based in Osaka, Japan, specializing in advanced hair washing technology and related beauty apparatus. The organization focuses on developing innovative solutions such as automatic hair washers, hair processing accelerators, and multifunctional beauty chairs. Their product lineup also includes specialized devices for facial treatments and unique designs like swivel pedestals and waterproof sheets, aimed at enhancing the efficiency and comfort of beauty and personal care services.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 13 2026

66 Patents

#155 in Osaka

#1,458 in Japan

#11,167 in the World

Osaka, JP
Osaka, Japan

Oohiro Works, Ltd.

Forward Citations = 380

10 inventors:

goldMedal Nobuyuki Minami (32 out of 32 patents)

silverMedal Hirohisa Shimizu (16 out of 17 patents)

bronzeMedal Kazuo Ooyama (10 out of 10 patents)

4.  Toshiaki Kawakami (3 out of 3 patents)

5.  Toshiyuki Sato (3 out of 4 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Oohiro Works, Ltd.. Retrieved from https://idiyas.com/company/oohiro-works

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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