Company Filing History:

15 out of 42,485

Hitachi, Ltd.

patents

1 out of 66

Hitachi Video Engineering, Incorporated

patents

where one patent can have more than one assignee

Years Active: 1979-2000

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15 patents (USPTO):Sort by Forward Citations

Abstract keywords

1. 6115011 - Plasma display device and driving method (2000-09-05),

2. 5499145 - Magnetic recording apparatus with capability of recording signals of a (1996-03-12),

3. 5414523 - Audio signal recording/reproducing apparatus for recording and (1995-05-09),

4. 5374955 - High-definition imaging device, and apparatuses for recording and (1994-12-20),

5. 5323273 - Audio signal recording and playback apparatus of magnetic recording and (1994-06-21),

6. 5307171 - Video tape recorder/player (1994-04-26),

7. 5122885 - Magnetic video recording/reproducing apparatus for video signals of (1992-06-16),

8. 4819097 - Audio signal recording/reproducing system for use in time-lapse video (1989-04-04),

9. 4809096 - Tracking controlling device using multiple pilot signals in magnetic (1989-02-28),

10. 4772975 - Magnetic reproducing apparatus (1988-09-20),

11. 4581659 - Method and apparatus for reproducing information at variable speeds from (1986-04-08),

12. 4581658 - Variable speed picture reproducing apparatus for video tape recorder (1986-04-08),

13. 4507690 - Device for controlling consecutive recording of video information (1985-03-26),

14. 4153922 - Relay control circuit (1979-05-08),

15. 4142375 - Control apparatus for air conditioning unit (1979-03-06),

Title: Nobuo Azuma: Innovator in Display and Recording Technologies

Introduction

Nobuo Azuma is a prominent inventor based in Yokohama, Japan. He has made significant contributions to the fields of display and recording technologies, holding a total of 15 patents. His innovative work has had a lasting impact on the industry.

Latest Patents

One of his latest patents is for a plasma display device and driving method. This device is capable of controlling the brightness of the entire image on a screen over a wide range without impairing a predetermined number of display gradations determined by the dynamic range of an A/D converter and an analogue input circuit. The plasma display device includes means for changing the discharge condition during priming discharging, which is effected for initialization, in accordance with the brightness control to manage the brightness of light emission during image display. Another notable patent is for a magnetic recording apparatus with the capability of recording signals of multiple formats. This rotary head helical scan type apparatus can selectively record input information signals of various signal formats, including NTSC and HD signals, by automatically adjusting to the optimum mode through a simple and user-friendly method.

Career Highlights

Nobuo Azuma has worked with notable companies such as Hitachi, Ltd. and Hitachi Video Engineering, Incorporated. His experience in these organizations has allowed him to develop and refine his innovative ideas, contributing to advancements in technology.

Collaborations

Throughout his career, Nobuo has collaborated with talented individuals, including Takashi Furuhata and Katsuo Mohri. These collaborations have further enriched his work and led to the development of groundbreaking technologies.

Conclusion

Nobuo Azuma's contributions to the fields of display and recording technologies are noteworthy. His innovative patents and collaborations have significantly influenced the industry, showcasing his expertise and dedication to advancing technology.

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