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For the Inventor, By the Inventor

Kitakyushu, Japan

Seiichiro Hiratsuka

This inventor holds 51 USPTO granted patents, primarily in Image Processing (CPC class 3584). Top assignees: Konishiroku Photo Industry Co., Ltd., Matsushita Electric Industrial Co., Ltd., Konica Corporation. Active years: 1985-2006.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Seiichiro Hiratsuka. Retrieved from https://idiyas.com/inventor/seiichiro-hiratsuka

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

USPTO Granted Patents = 51

% Patents Active = 96.1

Average Co-Inventor Count = 2.7

ph-index = 17

Forward Citations = 761(Granted Patents)

Forward Citations (Not Self Cited) = 756(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Tokyo, JP (1988 - 1993)
  • Hachioji, JP (1985 - 1994)
  • Fukuoka, JP (1993 - 2005)
  • Kitakyushu, JP (1994 - 2006)

Company Filing History:

goldMedal22 out of 1,252 
 
Konishiroku Photo Industry Co., Ltd.
 patents
silverMedal15 out of 27,375 
 
Matsushita Electric Industrial Co., Ltd.
 patents
bronzeMedal14 out of 3,106 
 
Konica Corporation
 patents

Years Active: 1985-2006

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Areas of Expertise:
Image Coding
Image Compression
Color Adjustment
Image Processing
Multicolor Image Formation
Halftone Image
Signal Conversion
Toner Control
Image Formation
Density Conversion
Image Discrimination
Image Retainer Cleaning
51 patents (USPTO):Explore Patents
1. 7068859 - Method and apparatus for three-dimensional signal conversion (2006-06-27),
2. 6924819 - Image processor (2005-08-02),
3. 6801664 - Method of image coding, image coding apparatus, and recording medium including image coding program (2004-10-05),
4. 6681049 - Image encoding method and apparatus (2004-01-20),
5. 6611620 - Reversible coding method, reversible coding apparatus, and memory medium used therein (2003-08-26),
6. 6563604 - Method of gradation reproduction (2003-05-13),
7. 6108441 - Color adjustment method for pixels of color images that designates color (2000-08-22),
8. 6067380 - Image compression method (2000-05-23),
9. 5978098 - Image compression method (1999-11-02),
10. 5907414 - Color image processing apparatus (1999-05-25),
11. 5715095 - Color separating device and color image reading device incorporating same (1998-02-03),
12. 5387988 - Image signal processing apparatus and image formation apparatus (1995-02-07),
13. 5357354 - Color image processing apparatus capable of discriminating between a (1994-10-18),
14. 5337167 - Halftone image forming apparatus including density based dot enlargement (1994-08-09),
15. 5301271 - Image processing separately processing two-density-level image data and (1994-04-05),

Title: The Innovations of Seiichiro Hiratsuka

Introduction

Seiichiro Hiratsuka, a prominent inventor based in Kitakyushu, Japan, has made significant contributions to the fields of imaging technology and signal processing. With an impressive portfolio of 51 patents, his work continues to influence various industries through innovative solutions.

Latest Patents

Hiratsuka's latest patents showcase his advancements in technology. One notable invention is the "Method and apparatus for three-dimensional signal conversion." This invention involves dividing a three-dimensional space formed by three-channel input signals into multiple polyhedrons, allowing for nonlinear interpolation based on associated conversion data. Additionally, his "Image processor" patent introduces a sophisticated device that enhances color signal processing through a series of units designed for color conversion, gamma correction, and logical operations to generate high-quality color outputs.

Career Highlights

Throughout his career, Hiratsuka has worked with leading companies, including Konishiroku Photo Industry Co., Ltd. and Matsushita Electric Industrial Co., Ltd. His roles in these organizations have been pivotal in advancing imaging technology, confirming his status as a key player in the field.

Collaborations

In his journey, Hiratsuka has had the opportunity to collaborate with notable professionals such as Satoshi Haneda and Hisashi Shoji. These partnerships have likely contributed to his innovative approaches and successful advancements in technology, fostering a dynamic exchange of ideas.

Conclusion

Seiichiro Hiratsuka exemplifies the essence of innovation through his numerous patents and contributions to imaging technology. His commitment to advancing the field highlights the importance of creativity and collaboration in driving progress. As technology evolves, Hiratsuka's inventions will remain influential, paving the way for future developments in signal processing and image processing technologies.

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]
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