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Tokyo, undefined

Japanese National Railways

USPTO Granted Patents = 50

Forward Citations = 742

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179 inventors (with patents filed for the assignee):

Hirotsugu Oishibashi (5 out of 7 patents)

Muneyuki Ohara (4 out of 6 patents)

Katsuyoshi Ueyama (4 out of 4 patents)

4. Mitsuo Nakamura (4 out of 4 patents)

5. Yoshiro Hayashi (3 out of 3 patents)

6. Kiyoshi Wada (2 out of 24 patents)

7. Eiji Yamanaka (2 out of 19 patents)

8. Satoru Kishimoto (2 out of 5 patents)

9. Isamu Itoh (2 out of 4 patents)

10. Ken Itoh (2 out of 4 patents)

11. Yoshihiro Murata (2 out of 5 patents)

12. Takaki Shimura (2 out of 39 patents)

13. Tadakazu Yamashita (2 out of 7 patents)

14. Akio Otani (2 out of 2 patents)

15. Keiji Shimizu (2 out of 2 patents)

Core Competencies:

Credit Settlement

Friction Brakes

Vibration Control

Rail Insulated Joint

Automatic Train Control

Levitation Mechanism

Noise Control

Railroad Track Bed

Current Collector

Tunnel Excavation

Shock Control Device

Optical Measurement

50 patents: Sort by Forward Citations

1. 4794530 - Credit settlement and ticketing terminal system (1988-12-27),

2. 4760900 - Friction brakes (1988-08-02),

3. 4746143 - Vibration control apparatus for vehicles (1988-05-24),

4. 4696446 - System for detecting flat portion of peripheral surface of vehicle wheel (1987-09-29),

5. 4652495 - Resilient coat for tie of direct-connection type track (1987-03-24),

6. 4648224 - Tendon for prestressed concrete (1987-03-10),

7. 4630772 - Insulating plate for rail insulated joint (1986-12-23),

8. 4622664 - Channel control system for loop type signal transmission channel (1986-11-11),

9. 4576324 - Gas pressure welding machine (1986-03-18),

10. 4557087 - Metallic sheath for a posttensioning method provided with rust proofing (1985-12-10),

11. 4556164 - Method of field welding head-hardened rails (1985-12-03),

12. 4520756 - Build-up spraying apparatus (1985-06-04),

13. 4468572 - Feeder voltage compensating apparatus for electric railway (1984-08-28),

14. 4459668 - Automatic train control device (1984-07-10),

15. 4436313 - Device for sealing a propeller shaft against invasion of sea water (1984-03-13),

Japanese National Railways, also known as JNR, was the national railway system of Japan from 1949 to 1987. It operated the majority of the railways in the country and played a crucial role in the transportation infrastructure. JNR provided services for both passengers and freight, connecting various regions within Japan. Today, the company is divided into several regional railway companies, such as East Japan Railway Company (JR East), West Japan Railway Company (JR West), and others, each managing different sections of the rail network and offering a wide range of transportation services.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

50 Patents

#6 in Tokyo

#1,673 in J

#13,575 in the World

Tokyo, undefined

Japanese National Railways

Forward Citations = 742

179 inventors:

Hirotsugu Oishibashi (5 out of 7 patents)

Muneyuki Ohara (4 out of 6 patents)

Katsuyoshi Ueyama (4 out of 4 patents)

4. Mitsuo Nakamura (4 out of 4 patents)

5. Yoshiro Hayashi (3 out of 3 patents)

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