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Ricoh Electronic Devices Co., Ltd.

USPTO Granted Patents = 16

EPO Patents = 1

Forward Citations = 30

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17 inventors (with patents filed for the assignee):

Shohtaroh Sohma (2 out of 14 patents)

Yohichi Shiwaya (2 out of 7 patents)

Yuusuke Michishita (2 out of 2 patents)

4. Takahiro Tsuji (1 out of 19 patents)

5. Daijiro Sumino (1 out of 2 patents)

6. Shinya Shimizu (1 out of 55 patents)

7. Yohkoh Hirose (1 out of 2 patents)

8. Yuji Takeyama (1 out of 1 patent)

9. Kimihiro Nishijima (1 out of 6 patents)

10. Masayuki Funakoshi (1 out of 1 patent)

11. Tatsuya Irisawa (1 out of 1 patent)

12. Masashi Oshima (1 out of 4 patents)

13. Daisuke Kanzaki (1 out of 1 patent)

14. Kiyohito Hara (1 out of 4 patents)

15. Keiichi Ashida (1 out of 3 patents)

16 patents: Sort by Forward Citations

1. 11223184 - Semiconductor laser driver having electronic dimming function without using optical components (2022-01-11),

2. 10635127 - Reference voltage generator circuit generating reference voltage based on band gap by controlling currents flowing in first and second voltage generator circuits (2020-04-28),

3. 10284075 - Overvoltage protection circuit for protecting overvoltage corresponding to wide range of input voltage (2019-05-07),

4. 9812959 - Step up/down switching regulator (2017-11-07),

5. 9584019 - Switching regulator and control method thereof (2017-02-28),

6. 9431907 - Switching regulator incorporating operation monitor (2016-08-30),

7. 9413243 - Non-insulating type switching power supply device (2016-08-09),

8. 9148133 - Trimming circuit, power supply including trimming circuit, and trimming method (2015-09-29),

9. 9146261 - Electronic device and method of electronic device for determining power source device (2015-09-29),

10. 9136847 - Signal transmitting-receiving control circuit and secondary battery protection circuit (2015-09-15),

11. 9106081 - Secondary cell protection circuit and battery (2015-08-11),

12. 9103893 - Voltage monitor semiconductor device, battery pack, and electronic device employing battery pack (2015-08-11),

13. 9087714 - Semiconductor integrated circuit and semiconductor integrated circuit apparatus (2015-07-21),

14. 9071125 - Switching regulator, control method thereof and power-supply device (2015-06-30),

15. 9069366 - Switching regulator (2015-06-30),

RICOH ELECTRONIC DEVICES CO., LTD. is a leading manufacturer and supplier of electronic devices, specializing in providing innovative solutions for various industries. With a diverse range of products including semiconductors, optical devices, and electronic components, RICOH ELECTRONIC DEVICES is committed to delivering high-quality and reliable technology that meets the evolving needs of customers worldwide.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

16 Patents

#312 in Osaka

#3,262 in Japan

#36,671 in the World

Ricoh Electronic Devices Co., Ltd.

Forward Citations = 30

17 inventors:

Shohtaroh Sohma (2 out of 14 patents)

Yohichi Shiwaya (2 out of 7 patents)

Yuusuke Michishita (2 out of 2 patents)

4. Takahiro Tsuji (1 out of 19 patents)

5. Daijiro Sumino (1 out of 2 patents)

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