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Trademarks = 2

Forward Citations = 302

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5 inventors (with patents filed for the assignee):

Cheng-Hwa Chuang (7 out of 8 patents)

Cheng-hua Chuang (6 out of 7 patents)

C H Chuang (2 out of 2 patents)

4. Bao-Shen Liu (1 out of 13 patents)

5. A T Lee (1 out of 1 patent)

17 patents: Sort by Forward Citations

1. D446245 - Pen cap (2001-08-08),

2. D436997 - Pen cap (2001-01-31),

3. 6161976 - Automatic writing apparatus for segmental writing elements with caps (2000-12-19),

4. 6149330 - Building blocks type writing instrument (2000-11-21),

5. D422308 - Building block type writing implement (2000-04-04),

6. D419187 - Building block-type writing implement (2000-01-18),

7. 5984550 - Writing device (1999-11-16),

8. D394876 - Combined refillable eraser tips and holder therefor (1998-06-02),

9. D384103 - Toy bear writing implement (1997-09-23),

10. D359510 - Cap for writing instrument (1995-06-20),

11. D355442 - Combined refillable eraser tips and container therefor (1995-02-14),

12. D341623 - Combined writing instrument and replaceable writing tips (1993-11-23),

13. 5221152 - Writing instrument with cap (1993-06-22),

14. 5044804 - Writing instrument (1991-09-03),

15. D317324 - Cap for writing tools (1991-06-04),

Pioneer Industrial Corporation is a leading provider of industrial equipment and services. With a focus on quality and innovation, we offer a wide range of products including pumps, valves, and controls. Our team of experts is dedicated to providing exceptional customer service and custom solutions to meet the needs of our clients. Visit our website to learn more about how Pioneer Industrial can help your business thrive.

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

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USPTO Data Jan 1 1976 - Dec 16 2025

17 Patents

#315 in Taipei

#907 in Taiwan

#34,832 in the World

Taipei, Taiwan

Pioneer Industrial Corporation