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For the Inventor, By the Inventor

Hitachi, Japan

Hideo Maejima

USPTO Granted Patents = 66

Average Co-Inventor Count = 3.2

ph-index = 19

Forward Citations = 1,430(Granted Patents)

Forward Citations (Not Self Cited) = 1,397(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Hitachi, JA (1978)
  • Hitachi., JP (1999)
  • Hitachi, JP (1982 - 2008)

Company Filing History:

goldMedal61 out of 42,496 
 
Hitachi, Ltd.
 patents
silverMedal9 out of 162 
 
Hitachi Engineering Co., Ltd.
 patents
bronzeMedal3 out of 3,781 
 
Renesas Technology Corp.
 patents
4. 2 out of 832,843 
Other
 patents
where one patent can have more than one assignee

Years Active: 1978-2008

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Areas of Expertise:
Data Processing
Microprocessor
Low Power Consumption
Semiconductor Integrated Circuit
Graphic Pattern Processing
Clock Signal Synchronization
Parallel Processing
Display Controller
Semiconductor Memory Device
Intra-LSI Clock Distribution
Bipolar Transistors
Dynamic Logic Circuit
66 patents (USPTO):Explore Patents
1. 7424598 - Data processor (2008-09-09),
2. 7111187 - Information processor and information processing system utilizing interface for synchronizing clock signal (2006-09-19),
3. 6789207 - Microprocessor (2004-09-07),
4. 6760832 - Data processor (2004-07-06),
5. 6675311 - Data processing system generating clock signal from an input clock, phase locked to the input clock and used for clocking logic devices (2004-01-06),
6. 6671815 - Low power consumption semiconductor integrated circuit device and microprocessor (2003-12-30),
7. 6646651 - Display controller (2003-11-11),
8. 6496919 - Data processor (2002-12-17),
9. 6492992 - Graphic pattern processing apparatus (2002-12-10),
10. 6256726 - Data processor for the parallel processing of a plurality of instructions (2001-07-03),
11. 6094193 - Display controller (2000-07-25),
12. 6088808 - Low power consumption semiconductor integrated circuit device and (2000-07-11),
13. 6023757 - Data processor (2000-02-08),
14. 5974560 - Information processor and information processing system utilizing clock (1999-10-26),
15. 5920510 - Semiconductor device capable of holding signals independent of the pulse (1999-07-06),

Title: **Hideo Maejima: A Pioneer in Data Processing Innovations**

Introduction

Hideo Maejima, based in Hitachi, Japan, is a renowned inventor with a remarkable portfolio featuring 66 patents. His innovative contributions primarily focus on advancements in data processing and information systems. With a solid foundation in engineering and a dedication to innovation, Maejima has made significant strides in his field.

Latest Patents

Among his latest inventions are two notable patents. The first is a **Data Processor**, designed for executing instructions through wired logic via a pipeline system. This invention boasts multiple instruction registers and an equivalent number of arithmetic operation units, enabling parallel processing of instructions in one machine cycle. The second is the **Information Processor and Information Processing System Utilizing Interface for Synchronizing Clock Signal**. This system is characterized by an original clock oscillator delivering a unique clock signal, with information processing units that generate phase-locked second clock signals to ensure synchronized operations across logic devices.

Career Highlights

Hideo Maejima has had an illustrious career, working with prestigious companies such as Hitachi, Ltd. and Hitachi Engineering Co., Ltd. His roles at these organizations have allowed him to thrive in an environment congenial to innovation and creativity, driving forward the capabilities of data processing technology.

Collaborations

Throughout his career, Maejima has collaborated with esteemed colleagues including Masahiro Iwamura and Koyo Katsura. These partnerships have fostered an environment of shared knowledge and encouraged the pursuit of groundbreaking inventions, further amplifying their collective contributions to the field.

Conclusion

Hideo Maejima stands as a testament to the power of innovation in the realms of data processing and information systems. With numerous patents to his name and significant collaborations, he continues to influence the industry, paving the way for future advancements that hold the potential to transform technology as we know it.

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