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For the Inventor, By the Inventor

Hotaka, Japan

Shunji Umemura

This inventor holds 12 USPTO granted patents. Top assignee: Seiko Epson Corporation. Active years: 2001-2006.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Shunji Umemura. Retrieved from https://idiyas.com/inventor/shunji-umemura

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

Calculating rank
USPTO Granted Patents = 12

% Patents Active = 66.7

Average Co-Inventor Count = 1.9

ph-index = 6

Forward Citations = 139(Granted Patents)


Location History:

  • Shiojiri, JP (2001)
  • Nagano, JP (2001)
  • Holaka-machi, JP (2001 - 2002)
  • Suwa, JP (2001 - 2004)
  • Hotaka-machi, JP (2001 - 2004)
  • Nagano-ken, JP (2003 - 2006)
  • Horaka-machi, JP (2006)

Company Filing History:

goldMedal12 out of 34,305 
 
Seiko Epson Corporation
 patents

Years Active: 2001-2006

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12 patents (USPTO):Explore Patents
1. 7061699 - Projection lens, producing method of projection lens and projector having projection lens (2006-06-13),
2. 6989894 - Lens evaluation method and lens-evaluating apparatus (2006-01-24),
3. 6829111 - Projection lens manufacturing apparatus, projection lens manufacturing method, projection lens manufactured by the projection lens manufacturing method and projector having the projection lens (2004-12-07),
4. 6760097 - Lens evaluation method and lens-evaluating apparatus (2004-07-06),
5. 6760096 - Lens-evaluating method and lens-evaluating apparatus (2004-07-06),
6. 6502932 - Print head device and ink jet printer including the print head device (2003-01-07),
7. 6412933 - Ink cartridge device (2002-07-02),
8. 6286946 - Ink cartridge device (2001-09-11),
9. 6283587 - Printer ink cartridge and ink cartridge device including the same (2001-09-04),
10. 6250745 - Ink cartridge for printers (2001-06-26),
11. 6244698 - Printhead unit and ink cartridge (2001-06-12),
12. 6220701 - Ink cartridge and method of disassembling the same (2001-04-24),

Title: The Innovative Mind of Shunji Umemura

Introduction: Shunji Umemura is a highly regarded inventor based in Hotaka-machi, Japan, known for his contributions to the field of optical engineering. With a remarkable portfolio of 12 patents, Umemura has made significant advancements in projection lens technology, showcasing his expertise and innovation.

Latest Patents: Among his latest patents, Shunji Umemura has developed a revolutionary projection lens and a method for producing it. The innovative projection lens comprises a cylindrical exterior case with a lens-shifting through-hole, and an inner circumferential step or flange. A critical component of this design includes a lens whose outer periphery is abutted to the inner step, alongside a flexible spacer and a retainer that holds the spacer, ensuring the lens is securely fixed within the exterior case. Additionally, Umemura has introduced a lens evaluation method and apparatus that calculates resolution evaluation values based on detected luminance values. This evaluation process includes steps for acquiring background luminance, maximum and minimum luminance values, and calculating resolution based on these metrics.

Career Highlights: Shunji Umemura has had a prominent career at Seiko Epson Corporation, where he has applied his innovative thinking and technical expertise to develop advanced projection technologies. His work has not only furthered the company's mission but has also made a lasting impact on the optical technology industry.

Collaborations: Throughout his career, Umemura has collaborated with other talented professionals, including Masashi Kitabayashi and Koichi Kojima, fostering an environment of shared knowledge and innovation that has led to his prolific patent output.

Conclusion: Shunji Umemura's dedication to innovation within the realm of optical engineering has established him as a key figure in the industry. His continued work at Seiko Epson Corporation and his numerous patents underline his commitment to advancing projection lens technology, paving the way for future innovations in the field.

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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