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For the Inventor, By the Inventor

Osaka, Japan

Clover Mfg. Co., Ltd.

USPTO Granted Patents = 137

% Expired Patents = 13.1


Trademarks = 7

Forward Citations = 1,071

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37 inventors (with patents filed for the assignee):

goldMedal Chihiro Iwasaki (28 out of 28 patents)

silverMedal Hidekazu Okada (16 out of 18 patents)

bronzeMedal Nancy L Zieman (15 out of 15 patents)

4.  Yasuhiro Fujiwara (11 out of 63 patents)

5.  Atsushi Tanaka (10 out of 51 patents)

6.  Kumiko Nitta (8 out of 8 patents)

7.  Katsuhiko Ozeki (8 out of 8 patents)

8.  Junichi Kuwabara (7 out of 11 patents)

9.  Mayumi Matsumoto (7 out of 7 patents)

10.  Yuji Kawasaki (7 out of 7 patents)

11.  Kanako Oe (7 out of 7 patents)

12.  Hiroko Ota (7 out of 7 patents)

13.  Joan Hawley (6 out of 7 patents)

14.  Yui Teramoto (5 out of 5 patents)

15.  Rie Shirai (5 out of 5 patents)


Core Competencies:
Needle Threader
Seam Ripper
Sewing Machine
Guiding Tool
Knitting Needle
Fabric Cutter
Handicraft Gauge
Yarn Twisting
Ironing Template
Pompon Maker
Patchworking Template
Sewing Clip

137 patents:

1. D1044886 - Fabric tube maker set (2024-10-01),
2. 11976399 - Needle threader and needle threading mechanism (2024-05-07),
3. D1008773 - Thread cutter (2023-12-26),
4. D971586 - Connecting end portion of a knitting needle (2022-12-06),
5. 11297905 - Fastening pin (2022-04-12),
6. 11220767 - Connection structure connecting knitting needle body and cable and circular knitting needle having the same (2022-01-11),
7. 11098425 - Measurable guiding tool for sewing machine (2021-08-24),
8. D912552 - Plate-type handicraft gauge (2021-03-09),
9. 10900155 - Instrument for making ribbon embellishment (2021-01-26),
10. D893325 - Measurable guiding tool for sewing machine (2020-08-18),
11. 10729198 - Seam ripper (2020-08-04),
12. D878034 - Magnetic needle holder (2020-03-17),
13. D877487 - Retractable seam ripper (2020-03-10),
14. 10378144 - Handheld roller device for sewing (2019-08-13),
15. 10301753 - Presser foot for sewing machine (2019-05-28),
Company Overview
Clover Mfg. Co., Ltd., based in Osaka, Japan, specializes in the development and manufacturing of high-quality sewing tools and accessories. The company is recognized for its innovative products, including needle threaders, seam rippers, and various guiding tools that enhance the sewing experience. Clover also produces specialized items such as knitting needles, fabric cutters, handicraft gauges, and yarn twisting tools, catering to both hobbyists and professionals in the textile and crafting industries.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

137 Patents

#97 in Osaka

#912 in Japan

#5,910 in the World

Osaka, JP
Osaka, Japan

Clover Mfg. Co., Ltd.

Forward Citations = 1,071

37 inventors:

goldMedal Chihiro Iwasaki (28 out of 28 patents)

silverMedal Hidekazu Okada (16 out of 18 patents)

bronzeMedal Nancy L Zieman (15 out of 15 patents)

4.  Yasuhiro Fujiwara (11 out of 63 patents)

5.  Atsushi Tanaka (10 out of 51 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Clover Mfg. Co., Ltd.. Retrieved from https://idiyas.com/company/clover-mfg-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]
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