logo

For the Inventor, By the Inventor

Yokohama, Japan

Masatomo Kakuyama

This inventor holds 11 USPTO granted patents. Top assignee: Nissan Motor Company Limited. Active years: 2001-2003.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masatomo Kakuyama. Retrieved from https://idiyas.com/inventor/masatomo-kakuyama

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

USPTO Granted Patents = 11

% Patents Active = 100.0

Average Co-Inventor Count = 3.4

ph-index = 7

Forward Citations = 139(Granted Patents)


Company Filing History:

goldMedal11 out of 13,420 
 
Nissan Motor Company Limited
 patents

Years Active: 2001-2003

Loading Chart...
11 patents (USPTO):Explore Patents
1. 6637194 - Exhaust emission control for engine (2003-10-28),
2. 6622479 - Engine exhaust purification device (2003-09-23),
3. 6619032 - Engine exhaust purification device (2003-09-16),
4. 6564544 - Engine exhaust purification arrangement (2003-05-20),
5. 6499290 - Engine exhaust purification device (2002-12-31),
6. 6494038 - Engine air-fuel ratio controller (2002-12-17),
7. 6490859 - Engine exhaust purification device (2002-12-10),
8. 6446429 - Air-fuel ratio control of engine (2002-09-10),
9. 6381954 - Air/fuel ratio control system of internal combustion engine (2002-05-07),
10. 6314724 - Air-fuel ratio controller and method of controlling air-fuel ratio (2001-11-13),
11. 6282889 - Air/fuel ration control system of internal combustion engine (2001-09-04),

Title: Masatomo Kakuyama: Innovator in Engine Emission Control

Introduction

Masatomo Kakuyama is a prominent inventor based in Yokohama, Japan. He has made significant contributions to the field of engine emission control, holding a total of 11 patents. His work focuses on improving the efficiency and effectiveness of catalytic converters in engines.

Latest Patents

One of Kakuyama's latest patents involves an innovative exhaust emission control arrangement for engines. This system includes a catalytic converter equipped with a three-way catalyst. A first oxygen sensor detects the oxygen concentration of exhaust gas upstream of the catalyst, while a second sensor measures the concentration downstream. A microprocessor calculates the oxygen storage and release amounts of the catalyst based on the readings from these sensors. This technology aims to optimize the engine's air-fuel ratio, ensuring that the oxygen storage amount aligns with a target value, thereby enhancing exhaust purification.

Another notable patent is an engine exhaust purification device that computes the oxygen storage amount of the catalyst as both a high-speed and low-speed component. This allows for precise control of the oxygen storage amount, regardless of variations in catalyst temperature. The system computes a target air-fuel ratio to maintain the oxygen storage at a predetermined level, significantly improving the accuracy of emission control.

Career Highlights

Masatomo Kakuyama is currently employed at Nissan Motor Company Limited, where he continues to develop innovative solutions for engine emissions. His expertise in this area has positioned him as a key figure in the automotive industry, particularly in efforts to meet stringent environmental regulations.

Collaborations

Kakuyama has collaborated with notable colleagues, including Osamu Matsuno and Shigeaki Kakizaki. Their combined efforts have contributed to advancements in emission control technologies, further enhancing the performance and sustainability of automotive engines.

Conclusion

Masatomo Kakuyama's work in engine emission control exemplifies the importance of innovation in the automotive industry. His patents reflect a commitment to improving environmental standards while maintaining engine performance. Through his contributions, Kakuyama continues to play a vital role in shaping the future of automotive 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]
Loading…