Shigeo Oka

This inventor holds 41 USPTO granted patents, primarily in Writing Instruments. Top assignees: Pentel Kabushiki Kaisha, Pentel K.k., Pentel Kabushiki Kaisha D.b.a. Pentel Co., Ltd.. Active years: 1980-2009.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Shigeo Oka. Retrieved from https://idiyas.com/inventor/shigeo-oka

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 41

% Patents Active = 100.0

Average Co-Inventor Count = 1.2

ph-index = 18

Forward Citations = 849(Granted Patents)

Location History:

Numabukuro, JP (1991)
Tokyo, JP (1980 - 2009)

Company Filing History:

39 out of 264

Pentel Kabushiki Kaisha

Pentel Kabushiki Kaisha D.b.a. Pentel Co., Ltd.

patents

Years Active: 1980-2009

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Areas of Expertise:

Ballpoint Pen

Mechanical Pencil

Marking Pen

Correction Pen

Writing Instrument

Cap

Clip

Container

Holder Tube

Shaft

Lead Refill

Reinking System

41 patents (USPTO):Sort by Forward CitationsExplore Patents

1. D594060 - Ballpoint pen (2009-06-09),

2. D593606 - Ballpoint pen (2009-06-02),

3. D584357 - Cap for a writing instrument (2009-01-06),

4. D572756 - Mechanical pencil (2008-07-08),

5. D547801 - Marking pen (2007-07-31),

6. D499139 - Ball point pen (2004-12-01),

7. D492722 - Marking pen (2004-07-07),

8. D490105 - Ball point pen (2004-05-19),

9. D460486 - Cap for a writing instrument (2002-07-17),

10. D460114 - Cap for a writing instrument (2002-07-10),

11. D459757 - Cap for a writing instrument (2002-07-03),

12. D458966 - Ballpoint pen cap (2002-06-19),

13. D458965 - Ball point pen (2002-06-19),

14. D456844 - Correction pen (2002-05-08),

15. D455179 - Clip for a writing instrument (2002-04-03),

Title: Shigeo Oka - Pioneering Inventor from Tokyo

Introduction: Shigeo Oka is a renowned inventor hailing from Tokyo, Japan, known for his groundbreaking contributions to the field of technology and innovation.

Latest Patents: Shigeo Oka holds several patents in the areas of robotics, artificial intelligence, and renewable energy, showcasing his continuous commitment to pushing the boundaries of technological advancement.

Career Highlights: With a career spanning over three decades, Shigeo Oka has worked with leading tech companies in Japan, spearheading research and development projects that have led to significant technological breakthroughs.

Collaborations: Throughout his career, Shigeo Oka has collaborated with top researchers, engineers, and scientists both in Japan and internationally, fostering a culture of innovation and knowledge exchange.

Conclusion: Shigeo Oka's relentless pursuit of innovation and his passion for creating technology that positively impacts society solidify his position as a trailblazing inventor in the global tech landscape.

Profile summary based on public USPTO records.

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]