Company Filing History:

11 out of 2,333

Hitachi Metals, Ltd.

Hitachi Maxell, Limited

patents

4. 1 out of 3

Hitachi Ferrite, Ltd.

where one patent can have more than one assignee

Years Active: 1991-1998

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11 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5854870 - Short-wavelength laser light source (1998-12-29),

2. 5789902 - Bi-direction current control circuit for monitoring charge/discharge of (1998-08-04),

3. 5412502 - Second harmonic generating element and the production method thereof (1995-05-02),

4. 5371482 - Magnetostatic wave device containing acoustic wave absorbing layer (1994-12-06),

5. 5359452 - Lithium tantalate monocrystal, monocrystal substrate, and photo element (1994-10-25),

6. 5357898 - Method of producing single crystal and apparatus therefor (1994-10-25),

7. 5192928 - Circuit element having ferrimagnetic film with deviated end surfaces for (1993-03-09),

8. 5189383 - Circuit element utilizing magnetostatic wave (1993-02-23),

9. 5168254 - Magnetostatic wave device with minimized higher order mode excitations (1992-12-01),

10. 5053734 - Magnetostatic wave device (1991-10-01),

11. 4992760 - Magnetostatic wave device and chip therefor (1991-02-12),

Title: Kohei Ito: Innovator in Laser Technology and Battery Monitoring

Introduction

Kohei Ito is a prominent inventor based in Fukaya, Japan. He holds a total of 11 patents, showcasing his significant contributions to the fields of laser technology and battery monitoring systems. His innovative work has made a lasting impact on various technological advancements.

Latest Patents

One of his latest patents is a short-wavelength laser light source. This invention includes a harmonic modulation device of waveguide type, which features a semiconductor laser and a waveguide designed to generate a nonlinear optical harmonic. The device maintains phase matching and includes means for leading an optical beam to the waveguide, electrodes on the waveguide, and electro-optical modulation of the refractive index to control the intensity of the harmonic.

Another notable patent is a bi-directional current control circuit for monitoring charge and discharge of a secondary battery. This battery-monitoring circuit incorporates a bidirectionally current-controllable means positioned between the battery and a charging or load circuit. It prevents undesirable charging by monitoring the battery's charge or discharge, utilizing an active diode configuration with an error amplifier.

Career Highlights

Throughout his career, Kohei Ito has worked with esteemed companies such as Hitachi Metals, Ltd. and Hitachi, Ltd. His experience in these organizations has allowed him to develop and refine his innovative ideas, contributing to the advancement of technology in his field.

Collaborations

Kohei Ito has collaborated with notable coworkers, including Yasuhide Murakami and Fumio Nitanda. Their combined expertise has fostered a creative environment that has led to significant technological breakthroughs.

Conclusion

Kohei Ito's contributions to laser technology and battery monitoring systems exemplify his innovative spirit and dedication to advancing technology. His patents reflect a commitment to solving complex problems and enhancing the efficiency of modern devices.

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