Company Filing History:
4 out of 21,351 
1 out of 1 Years Active: 1992-1999
Title: Seiji Kishikawa: Innovator in Magnetic Recording Technology
Introduction
Seiji Kishikawa is a notable inventor based in Nagaokakyo, Japan. He has made significant contributions to the field of magnetic recording technology, holding a total of 5 patents. His work has advanced the capabilities of recording and reproducing sound and picture signals.
Latest Patents
One of Kishikawa's latest patents is a magnetic recording and reproducing apparatus designed for controlling the tension of magnetic tape. This innovative apparatus allows for the recording of desired sound or picture signals onto magnetic tape using a magnetic head. During normal-speed recording and reproduction, the magnetic tape is taken up at a constant speed. However, by adjusting the tape traveling speed on the rotary drum, it enables DTF control and high-speed noiseless reproduction. The apparatus features a tape tension actuator and a tape drawing actuator, which work together to maintain the desired tension on the entrance side of the rotary drum. In DTF control, both actuators correct any tracking errors cooperatively. For high-speed noiseless reproduction, the actuators are differentially driven to reduce the tape traveling speed on the rotary drum, utilizing modern feedback control techniques.
Career Highlights
Kishikawa has worked with prominent companies, including Mitsubishi Electric Corporation and Mitsubishi Electric. His experience in these organizations has contributed to his expertise in magnetic recording technologies.
Collaborations
Throughout his career, Kishikawa has collaborated with notable individuals such as Masami Tomita and Yoshinori Kakuta. These collaborations have further enriched his work and innovations in the field.
Conclusion
Seiji Kishikawa's contributions to magnetic recording technology have made a lasting impact on the industry. His innovative patents and collaborations highlight his dedication to advancing this field.