Company Filing History:
2 out of 86 
2 out of 5,294 
Years Active: 1987-1988
Title: Jouji Tanaka: Innovator in Telecommunication Technology
Introduction
Jouji Tanaka is a notable inventor based in Kawasaki, Japan. He has made significant contributions to the field of telecommunication technology, holding a total of 2 patents. His innovative designs have improved the functionality and efficiency of key telephone systems.
Latest Patents
One of Jouji Tanaka's latest patents is the "Ringing signal sending-out circuit." This invention involves a circuit designed to send out a high voltage and low frequency ringing signal to a telephone set through a telephone line. The circuit operates without the need for a high power oscillator and relays, utilizing a D.C. power supply connected to the telephone line through phototransistors driven by a low voltage pulse signal. This allows for the ringing signal to be sent out repeatedly at predetermined time intervals.
Another significant patent is the "Key telephone system with means for operatively connecting another key." This system comprises a main equipment and multiple key telephones connected to it. The main equipment includes interfaces for transmitting and receiving system calls, allowing for seamless communication between different key telephone systems. By using an additional key on one telephone, users can establish a speech path to another key telephone in a different system, enhancing interconnectivity.
Career Highlights
Throughout his career, Jouji Tanaka has worked with prominent companies such as Nitsuko Corporation and Nippon Telegraph and Telephone Corporation. His experience in these organizations has contributed to his expertise in telecommunication systems and innovations.
Collaborations
Jouji Tanaka has collaborated with notable coworkers, including Yoshiji Tanimoto and Masaaki Saito. Their collective efforts have further advanced the development of telecommunication technologies.
Conclusion
Jouji Tanaka's contributions to telecommunication technology through his patents and career achievements highlight his role as an influential inventor. His work continues to impact the industry, showcasing the importance of innovation in communication systems.