Company Filing History:

9 out of 42,485

Hitachi, Ltd.

patents

1 out of 162

Hitachi Engineering Co., Ltd.

patents

where one patent can have more than one assignee

Years Active: 1987-1993

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9 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5208811 - Interconnection system and method for heterogeneous networks (1993-05-04),

2. 5058114 - Program control apparatus incorporating a trace function (1991-10-15),

3. 5023871 - Method of controlling the operation of stations in a ring network (1991-06-11),

4. 4899142 - Ring network system and configuration control method (1990-02-06),

5. 4887256 - Data communication network system and reconfiguration control method (1989-12-12),

6. 4815069 - Data communication network system and reconfiguration control method (1989-03-21),

7. 4777330 - Network system diagnosis system (1988-10-11),

8. 4763315 - Ring communication network system and a method for controlling same (1988-08-09),

9. 4672607 - Local area network communication system (1987-06-09),

Title: The Innovations of Takeshi Harakawa

Introduction

Takeshi Harakawa is a notable inventor based in Hadano, Japan. He has made significant contributions to the field of technology, particularly in network systems and program control apparatuses. With a total of 9 patents to his name, Harakawa's work has had a lasting impact on the industry.

Latest Patents

One of Harakawa's latest patents is an "Interconnection system and method for heterogeneous networks." This invention addresses the interconnection between LAN terminals and ISDN terminals through an inter-working unit. The system allows the ISDN terminal to multiplex data link connections identified by respective data link connection identifiers on ISDN channels. After establishing a call to the ISDN terminal, the inter-working unit provides the LAN terminal with an ISDN channel number and a DLCI designating an ISDN communication path. The LAN terminal then sends a LAN frame with an OSI layer 2 header containing the communication path information to the inter-working unit, which converts the LAN frame into an ISDN frame based on the provided information.

Another significant patent is the "Program control apparatus incorporating a trace function." This invention features a program control apparatus with a program ROM that generates sequence control signals for various control actions based on specified conditions. A memory circuit is activated during a specific operation mode to store information corresponding to external conditions and the time taken by the operation sequence of the program control apparatus.

Career Highlights

Throughout his career, Takeshi Harakawa has worked with prominent companies such as Hitachi, Ltd. and Hitachi Engineering Co., Ltd. His experience in these organizations has allowed him to develop and refine his innovative ideas, contributing to advancements in technology.

Collaborations

Harakawa has collaborated with notable individuals in the field, including Jiro Kashio and Susumu Nakayashiki. These partnerships have fostered a creative environment that has led to the development of groundbreaking technologies.

Conclusion

Takeshi Harakawa's contributions to technology through his patents and collaborations highlight his role as a significant inventor in the industry. His innovative work continues to influence advancements in network systems and program control apparatuses.

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