Company Filing History:

14 out of 42,508

Hitachi, Ltd.

patents

1 out of 67

Hitachi Video Engineering, Incorporated

patents

where one patent can have more than one assignee

Years Active: 1980-1998

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14 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5825853 - Communication device (1998-10-20),

2. 5717818 - Audio signal storing apparatus having a function for converting speech (1998-02-10),

3. 5363263 - Coil assembly for rotary magnetic head apparatus (1994-11-08),

4. 5193045 - Helical scan type magnetic recording and/or reproducing apparatus having (1993-03-09),

5. 5126906 - Rotary magnetic head device with rotary transformer having high coupling (1992-06-30),

6. 5057944 - Multiplex rotating magnetic head system for multiply recording and (1991-10-15),

7. 4961122 - Hydrodynamic grooved bearing device (1990-10-02),

8. 4959743 - Jitter reducing tapered rotary drum for magnetic head apparatus (1990-09-25),

9. 4833562 - Rotary magnetic head cylinder device for suppressing vibrations ofa (1989-05-23),

10. 4803338 - Magnetic head having improved track width narrowing grooves (1989-02-07),

11. 4794483 - Magnetic head having layers of amorphous magnetic alloy bonded together (1988-12-27),

12. 4745507 - Composite type magnetic head with non-magnetic member in coil mounting (1988-05-17),

13. 4731683 - Magnetic recording and reproducing system with composite magnetic head (1988-03-15),

14. 4223292 - Hall element (1980-09-16),

Title: Juichi Morikawa: Innovator in Communication Technology

Introduction

Juichi Morikawa is a prominent inventor based in Katsuta, Japan. He has made significant contributions to the field of communication technology, holding a total of 14 patents. His innovative work has paved the way for advancements in audio processing and communication devices.

Latest Patents

One of Morikawa's latest patents is a communication device that features an automatic answering telephone function. This device can record messages spoken by a sender when there is an incoming signal in automatic answering mode. It also has the capability to interlacedly reproduce only the head parts of messages when the received message is to be reproduced. Additionally, the device includes a speech processing part that allows users to change the speech rate while maintaining a constant pitch. This enables the reproduction of recorded messages at a user-designated speech rate, as well as the transmission of rate-changed speech messages.

Another notable patent is an audio signal storing apparatus that can convert speech. This apparatus allows for the speed of input speech to be changed without altering the pitch. The raw data of the speech is stored in such a way that the speed can be modulated continuously based on the raw data. The speech speed conversion method involves carrying out a speech speed conversion process during designated periods when conversion is needed, while not performing conversion during other periods.

Career Highlights

Throughout his career, Juichi Morikawa has worked with notable companies such as Hitachi, Ltd. and Hitachi Video Engineering, Incorporated. His experience in these organizations has contributed to his expertise in communication technologies and audio processing.

Collaborations

Morikawa has collaborated with esteemed colleagues, including Hideo Zama and Makoto Ibe. Their joint efforts have further advanced the field of communication technology.

Conclusion

Juichi Morikawa's innovative contributions to communication technology have significantly impacted the industry. His patents reflect a deep understanding of audio processing and user needs, making him a key figure in this field.

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