Enter assignee name

EPO Patents = 1

Trademarks = 3

Forward Citations = 185

Loading Chart...

5 inventors (with patents filed for the assignee):

Mieko Sakai (10 out of 15 patents)

Kenichiro Saito (4 out of 9 patents)

Tsuyoshi Sakai (2 out of 4 patents)

4. Yukihiko Inoue (1 out of 15 patents)

5. Sumiyo Yamanashi (1 out of 4 patents)

6. Sumiyo c/o Doppei Co Ltd Yamanashi (0 patent)

13 patents: Sort by Forward Citations

1. 6866914 - Artificial stone having non-slip property (2005-03-15),

2. 6750283 - High-hardness, soft composite material (2004-06-15),

3. 6683520 - Magnet having dry pressed flower sealed therein (2004-01-27),

4. 6627315 - Artificial stone (2003-09-30),

5. 6500543 - Artificial stone molded product (2002-12-31),

6. 6365662 - Non-slip artificial stone (2002-04-02),

7. 6322862 - Pressed flowers enclosed article (2001-11-27),

8. 6309562 - Artificial stone (2001-10-30),

9. 6221300 - Method for manufacturing artificial stone (2001-04-24),

10. 6146548 - Noctilucent or fluorescent artificial stone (2000-11-14),

11. 6136226 - Noctilucent or fluorescent artificial stone composition (2000-10-24),

12. 6127458 - Artificial stone composition and method of manufacturing artificial stone (2000-10-03),

13. 5422391 - High density artificial stone and a method for producing therefor (1995-06-06),

Doppel Co., Ltd. is a leading technology company specializing in innovative wearable devices. Their flagship product, the Doppel wristband, uses cutting-edge technology to provide users with personalized stress relief and mood enhancement. With a focus on improving mental well-being, Doppel Co., Ltd. is dedicated to creating products that make a positive impact on people's lives.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Jan 6 2026

13 Patents

#1,452 in Tokyo

#3,660 in Japan

#43,713 in the World

Tokyo, Japan

Doppel Co., Ltd.