Hirofumi Ogawa

This inventor holds 9 USPTO granted patents. Top assignees: Hitachi, Ltd., Nippon Hoso' Kyokai. Active years: 1985-1993.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hirofumi Ogawa. Retrieved from https://idiyas.com/inventor/hirofumi-ogawa-z2l9b4iv

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

Calculating rank

USPTO Granted Patents = 9

% Patents Active = 100.0

Average Co-Inventor Count = 9.5

ph-index = 4

Forward Citations = 98(Granted Patents)

Company Filing History:

where one patent can have more than one assignee

Years Active: 1985-1993

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9 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5233265 - Photoconductive imaging apparatus (1993-08-03),

2. 5218264 - Image pick-up tube and apparatus having the same (1993-06-08),

3. 4952839 - Photoconductive device and method of operating the same (1990-08-28),

4. 4888521 - Photoconductive device and method of operating the same (1989-12-19),

5. 4883562 - Method of making a photosensor (1989-11-28),

6. 4636682 - Image pickup tube (1987-01-13),

7. 4626885 - Photosensor having impurity concentration gradient (1986-12-02),

8. 4609846 - Image pick-up tube having collector and balance electrodes (1986-09-02),

9. 4556817 - Photoelectric conversion apparatus (1985-12-03),

Title: Hirofumi Ogawa: A Visionary in Inventions

Introduction:

Hirofumi Ogawa, a prolific inventor based in Hachioji, Japan, is renowned for his relentless pursuit of innovation and his unwavering dedication to pushing the boundaries of technology. With a track record of 9 patents, Ogawa's groundbreaking contributions continue to inspire future generations of inventors and shape the landscape of technological advancements.

Latest Patents:

His latest patents showcase his ingenuity and technical expertise, with one focusing on a Photoconductive Imaging Apparatus. This apparatus features a photoconductive layer with an amorphous semiconductor capable of charge multiplication, enabling the realization of a highly sensitive yet low lag photoconductive device. Another patent involves an Image Pick-Up Tube and Apparatus, which optimizes the reading of video information converted into an electric signal in the photoconductive film by an electron beam, enhancing overall performance.

Career Highlights:

Ogawa's illustrious career includes impactful stints at renowned companies such as Hitachi Co., Ltd and Nippon Hoso Kyokai. His innovative spirit and dedication to excellence have led to numerous breakthroughs in the field of technology and patents.

Collaborations:

Throughout his career, Hirofumi Ogawa has collaborated with distinguished professionals in the industry, including Tadaaki Hirai and Yukio Takasaki. These collaborations have not only enriched his work but also fostered a culture of innovation and shared knowledge within the technological community.

Conclusion:

In conclusion, Hirofumi Ogawa stands as a true visionary in the realm of inventions, with a remarkable portfolio of patents and a legacy of innovation that continues to shape the future of technology. His unwavering commitment to pushing boundaries and inspiring others cements his place as a trailblazer in the world of inventions.

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]