Company Filing History:
Years Active: 1987-2007
Title: Kazuo Murayama: Innovator in Speaker Technology and Tape Recorders
Introduction
Kazuo Murayama is a notable inventor based in Kanagawa, Japan. He has made significant contributions to the fields of audio technology and tape recording. With a total of 4 patents to his name, Murayama's work reflects his innovative spirit and technical expertise.
Latest Patents
One of Murayama's latest patents is a speaker apparatus that features a frame to which a convex paper is attached. This design includes a bobbin with a voice coil attached to the paper cone, and a magnetic circuit formed inside the frame. The apparatus also incorporates a damper that suspends the bobbin, consisting of a corrugation portion positioned orthogonal to the bobbin during inactivity. The damper's first and second leg portions extend in opposite directions along the vibration direction of the bobbin, maintaining equal lengths.
Another significant patent is a changeover circuit in a tape recorder. This circuit includes a recording and reproducing integrated circuit (IC) with a signal terminal and a bias terminal. The design ensures that the DC potential at the signal terminal matches that at the bias terminal. A changeover transistor connects the signal line to the bias terminal, while a controller manages the transistor's operation through a resistor. Additionally, a bypass circuit is linked between the bias terminal and ground, with its state controlled by a voltage from the controller.
Career Highlights
Kazuo Murayama is currently employed at Sony Corporation, a leading company in the electronics industry. His work at Sony has allowed him to develop and refine his innovative ideas, contributing to the advancement of audio and recording technologies.
Collaborations
Murayama has collaborated with talented coworkers, including Kazuyuki Suda and Toshiya Murakami. These partnerships have fostered a creative environment that encourages the exchange of ideas and technical knowledge.
Conclusion
Kazuo Murayama's contributions to speaker technology and tape recorders highlight his innovative capabilities and dedication to advancing audio technology. His patents reflect a deep understanding of engineering principles and a commitment to enhancing user experiences in sound reproduction.