Company Filing History:
Years Active: 1986-1989
Title: Sadao Sekizawa: Innovator in Magnetic Detection Technology
Introduction
Sadao Sekizawa is a prominent inventor based in Hitachi, Japan. He has made significant contributions to the field of magnetic detection technology, holding a total of 3 patents. His work has advanced the capabilities of magnetic sensors, making them more efficient and effective in various applications.
Latest Patents
One of Sekizawa's latest patents is an apparatus for magnetically detecting the position of a movable magnetic body. This innovative device features a three-terminal magnetic field-intensity sensing structure formed by a pair of magneto-resistors. The sensing structure generates a first electrical signal of sinusoidal waveform in response to changes in the magnetic field intensity due to the movement of the magnetic body. This signal is then transformed into a second electrical signal of rectangular or sinusoidal waveform with an amplified amplitude. The circuit components for shaping or amplifying the first electrical signal are integrally mounted on a substrate alongside the magneto-resistors, ideally in the form of a hybrid integrated circuit.
Another notable patent is a magnetic detector designed to detect the angle, position, speed of rotation of a rotating body, or the linear position, distance, or speed of a linearly moving body. This detector utilizes a plurality of elongated stripe-shaped magnetoresistive elements arranged on a non-magnetic substrate. The design allows for a significant reduction in the total width of the magnetoresistive elements pattern, enhancing the performance of the magnetic detector by minimizing the influence of fluctuations in the gap between the detector and the magnetic recording medium.
Career Highlights
Sadao Sekizawa has dedicated his career to advancing magnetic detection technologies. His innovative designs and patents have positioned him as a key figure in this specialized field. He works at Hitachi, Ltd., a company known for its commitment to technological innovation and excellence.
Collaborations
Throughout his career, Sekizawa has collaborated with notable colleagues, including Toshio Seki and Hiroshi Kimura. These partnerships have contributed to the development of cutting-edge technologies in magnetic detection.
Conclusion
Sadao Sekizawa's contributions to magnetic detection technology have made a lasting impact on the industry. His innovative patents and collaborative efforts continue to shape the future of this field.