This inventor holds 4 USPTO granted patents. Top assignees: Nec Corporation, Other. Active years: 1995-2004.
Company Filing History:
3 out of 36,653 
1 out of 834,411 Years Active: 1995-2004
Title: Hirohiko Shibata: Innovator in Telecommunications and Environmental Solutions
Introduction
Hirohiko Shibata is a notable inventor based in Tokyo, Japan. He has made significant contributions to the fields of telecommunications and environmental technology. With a total of 4 patents, his work reflects a commitment to innovation and problem-solving.
Latest Patents
One of Shibata's latest patents is a "Subscriber circuit for public telephone set." This invention provides a subscriber circuit that eliminates the necessity for a voice signal to be introduced to a channel filter as a small signal. The design includes a voltage holding circuit controlled by a polarity reversal indication signal, which is also supplied to a loop current supply circuit. This allows the voltage detected by a line voltage detection circuit to be held effectively. Additionally, a reversal circuit is controlled by the same polarity reversal indication signal, enabling the voltage held by the voltage holding circuit to be reversed. The reversed voltage is then buffered by a low-pass filter, ensuring compatibility with the loop current supply circuit.
Another significant patent is the "Method and system for carrying out treatment of granular substances with pollutants adhered." This invention addresses the treatment of contaminated soils and incinerated ashes. The process involves finely granulating these substances to efficiently separate pollutants, allowing for recycling. The method includes a coarse disintegrating treatment followed by mutual polishing among the granular substances, which helps in classifying and separating pollutants such as heavy metals and dioxins.
Career Highlights
Hirohiko Shibata has worked with prominent companies, including NEC Corporation. His experience in these organizations has contributed to his expertise in developing innovative solutions in his fields of interest.
Collaborations
Shibata has collaborated with notable individuals such as Takao Tango and Yo Ito. Their combined efforts have likely fostered advancements in the projects they undertook together.
Conclusion
Hirohiko Shibata's contributions to telecommunications and environmental technology showcase his innovative spirit and dedication to solving complex problems. His patents reflect a blend of technical expertise and a commitment to improving everyday technologies.