Kyoji Marumoto

This inventor holds 14 USPTO granted patents and 4 published patent applications. Top assignees: Rohm Co., Ltd., Rohm Col, Ltd., Rohn Co., Ltd.. Active years: 1994-2020.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kyoji Marumoto. Retrieved from https://idiyas.com/inventor/kyoji-marumoto

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

USPTO Granted Patents = 14 (Patent Applications = 4)

% Patents Active = 85.7

Average Co-Inventor Count = 1.6

ph-index = 3

Forward Citations = 36(Granted Patents)

Company Filing History:

Years Active: 1994-2020

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14 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 10554118 - Power supply device (2020-02-04),

2. 10199974 - Motor driving circuit and motor driving method (2019-02-05),

3. 9804012 - Vehicle traveling information recording device (2017-10-31),

4. 8786420 - Drive recorder (2014-07-22),

5. 8675962 - Image correction processing circuit, semiconductor device, and image correction processing device (2014-03-18),

6. 8421517 - Semiconductor device including power conversion and a drive recorder (2013-04-16),

7. 8244309 - Driving recorder (2012-08-14),

8. 7286422 - Memory device with built-in test function and method for controlling the same (2007-10-23),

9. 6295590 - Semiconductor memory apparatus having a protecting circuit (2001-09-25),

10. 6229579 - Color encoder with chrominance subcarrier generator responsive to a plurality of clock rates or frequencies (2001-05-08),

11. 6226042 - Color encoder (2001-05-01),

12. 5774190 - Encoder with an on-screen display function (1998-06-30),

13. 5703993 - RGB encoder for converting digital signals to analog signals and (1997-12-30),

14. 5333163 - IC including counter circuit and one chip microcomputer thereof (1994-07-26),

Title: The Innovative Mind of Kyoji Marumoto

Introduction

Kyoji Marumoto is a prominent inventor based in Kyoto, Japan, known for his breakthroughs in power supply devices and motor driving technology. With a remarkable portfolio of 14 patents, he has contributed significantly to advancements in electrical engineering and systems integration.

Latest Patents

One of Marumoto's latest inventions is a power supply device that features a switch and a coil connected in series with alternating-current input power. This device utilizes a first rectifier across the coil for boost rectification, enabling effective charging of an output smoothing capacitor to obtain reliable output power.

Another significant invention by Marumoto is a motor driving circuit and method. In this setup, an initial position detection circuit employs an inductive sensing method to detect the rotor's initial position when a motor is energized. The circuit incorporates an automatic parameter generating system, which defines parameters for measuring time periods required for coil current thresholds under varying voltage polarities. The parameters are adjusted to optimize the detection of rotor position, enhancing motor performance.

Career Highlights

Kyoji Marumoto has enriched his career by collaborating with notable companies such as Rohm Co., Ltd. and Rohm Co., Ltd. His extensive experience in these organizations has provided him with a strong foundation in innovative technology development and application.

Collaborations

Throughout his career, Marumoto has worked alongside talented colleagues, including Masahito Kondo and Tatsuya Mori. Their collaborative efforts have played a crucial role in advancing various projects and inventions, contributing to the technological landscape in which they operate.

Conclusion

Kyoji Marumoto exemplifies the spirit of innovation with his impressive array of patents and contributions to electrical systems. His work continues to inspire future generations of inventors, showcasing the importance of creativity and engineering in technological progress.

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]

4 patents pending: