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For the Inventor, By the Inventor

Kanagawa, Japan

Yoshikazu Akiyama

This inventor holds 31 USPTO granted patents and 6 published patent applications and 6 EPO patents, primarily in Electromechanical Transducers. Top assignees: Ricoh Company, Ltd., Ricoh Research Institute of General Electronics, Toyota Jidosha Kabushiki Kaisha. Active years: 1989-2018.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yoshikazu Akiyama. Retrieved from https://idiyas.com/inventor/yoshikazu-akiyama

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

USPTO Granted Patents = 31 

% Patents Active = 74.2

 

Average Co-Inventor Count = 2.8

ph-index = 11

Forward Citations = 272(Granted Patents)


Location History:

  • Yokohama, JP (1989 - 2009)
  • Ohta-ku, JP (2004 - 2010)
  • Kanagawa-ken, JP (2014)
  • Kanagawa, JP (2005 - 2018)

Company Filing History:

goldMedal30 out of 28,951 
 
Ricoh Company, Ltd.
 patents
silverMedal1 out of 49 
 
Ricoh Research Institute of General Electronics
 patents
bronzeMedal1 out of 38,970 
 
Toyota Jidosha Kabushiki Kaisha
 patents
where one patent can have more than one assignee

Years Active: 1989-2018

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Areas of Expertise:
PZT Film
Electromechanical Transducer
Liquid Discharge Head
Thin-Film Capacitive Element
Inkjet Head
Droplet Discharge Apparatus
Organic Transistor
Active Matrix Substrate
Ferroelectric Material
Complex Oxide
Thin Film Transistor
31 patents (USPTO):Explore Patents
1. 9950524 - PZT-film laminated structure, liquid discharge head, liquid discharge device, liquid discharge apparatus, and method of making PZT-film laminated structure (2018-04-24),
2. 9834853 - PZT precursor solution, method for producing PZT precursor solution, method for producing PZT film, method for producing electromechanical transducer element, and method for producing liquid discharge head (2017-12-05),
3. 9595660 - Method of manufacturing electromechanical transducer, electromechanical transducer, droplet discharge head, droplet discharge apparatus, and image forming apparatus (2017-03-14),
4. 9583270 - Complex oxide, thin-film capacitive element, liquid droplet discharge head, and method of producing complex oxide (2017-02-28),
5. 9401471 - Electromechanical transducing device and manufacturing method thereof, and liquid droplet discharging head and liquid droplet discharging apparatus (2016-07-26),
6. 8960866 - Electromechanical transducer element, liquid discharge head, liquid discharge device, and image forming apparatus (2015-02-24),
7. 8919926 - Inkjet head and inkjet plotter (2014-12-30),
8. 8833921 - Thin-film forming apparatus, thin-film forming method, piezoelectric-element forming method, droplet discharging head, and ink-jet recording apparatus (2014-09-16),
9. 8733906 - Electromechanical conversion element, liquid drop ejection head, liquid drop ejection device, and image forming apparatus (2014-05-27),
10. 8727505 - Electromechanical transducer element, droplet discharge head, and droplet discharge device (2014-05-20),
11. 8690297 - Sol-gel liquid, electromechanical conversion element, liquid discharge head and inkjet recorder (2014-04-08),
12. 8646180 - Method for producing electromechanical transducer, electromechanical transducer produced by the method, liquid-droplet jetting head, and liquid-droplet jetting apparatus (2014-02-11),
13. 8602530 - Ink-jet head and ink-jet recording apparatus (2013-12-10),
14. 8454133 - Inkjet head, inkjet recording apparatus, liquid droplet ejecting apparatus, and image forming apparatus (2013-06-04),
15. 8425026 - Electromechanical transducer film and method for manufacturing electromechanical transducer film (2013-04-23),

Title: Contributions of Yoshikazu Akiyama in the Field of PZT Technology

Introduction

Yoshikazu Akiyama is a prominent inventor based in Kanagawa, Japan, with a remarkable portfolio of 31 patents to his name. His innovative contributions primarily revolve around PZT (Lead Zirconate Titanate) technologies, which have significant applications in various electronic devices and systems.

Latest Patents

Akiyama's latest patents include a range of advanced technologies such as PZT-film laminated structures, liquid discharge heads, liquid discharge devices, and liquid discharge apparatuses. One notable patent describes a PZT-film laminated structure that consists of a substrate, a lower electrode on the substrate, an orientation control layer on the lower electrode, a PZT layer on this orientation control layer, and an upper electrode on the PZT layer. In this structure, the PZT layer exhibits a (100) or (001) main orientation, demonstrating a peak intensity of 90% or greater in X-ray diffraction analysis. Furthermore, the patented PZT precursor solution, produced through a sol-gel method, is designed to form a high-quality PZT film, which is crucial for developing efficient electromechanical transducer elements and liquid discharge heads.

Career Highlights

Yoshikazu Akiyama has a distinguished career, notably working at Ricoh Company, Ltd. and Ricoh Research Institute of General Electronics. His time at these organizations has allowed him to collaborate on cutting-edge projects, leading to significant advancements in PZT technologies.

Collaborations

Throughout his career, Akiyama has worked alongside talented colleagues such as Satoshi Mizukami and Osamu Machida. Their collaborations have played a crucial role in developing innovative solutions in the field of electronics and material science.

Conclusion

Yoshikazu Akiyama’s contributions to PZT technology and his extensive patent portfolio reflect his expertise as an inventor. His work continues to inspire advancements in electronic devices, showcasing the vital role of innovations in shaping the future of technology.

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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