Company Filing History:
3 out of 9 
2 out of 58,131 
1 out of 1 Years Active: 1996-2004
Title: The Innovations of Toshio Hirosawa
Introduction
Toshio Hirosawa is a notable inventor based in Kanagawa, Japan. He has made significant contributions to the fields of audio technology and photography, holding a total of five patents. His work reflects a blend of creativity and technical expertise, making him a respected figure in his industry.
Latest Patents
One of Hirosawa's latest patents is a speaker device designed to supply output from an amplifier to multiple loudspeakers through a dividing network. This innovative design allows the network coil, which constitutes the dividing network, to be wound in a groove on the outer circumferential surface of the loudspeaker's driving part. This eliminates the need for the network coil to be mounted as a separate part on a terminal plate of the speaker box. Another significant patent involves a silver halide photographic material and a method for forming images. This invention enables the creation of monochrome images using a dye image, even when treated with a color developer that is free of benzyl alcohol. The photographic properties of the monochrome image are less affected by toxic gases like formaldehyde, and the issues of sensitization and fog over time are notably improved.
Career Highlights
Throughout his career, Toshio Hirosawa has worked with prominent companies such as Oriental Photo Industrial Co., Ltd. and Sony Corporation. His experience in these organizations has allowed him to refine his skills and contribute to groundbreaking innovations in his field.
Collaborations
Hirosawa has collaborated with talented individuals, including Kouji Katsube and Yoshiro Hayafuchi. These partnerships have fostered an environment of creativity and innovation, leading to the development of impactful technologies.
Conclusion
Toshio Hirosawa's contributions to audio technology and photography demonstrate his inventive spirit and technical prowess. His patents reflect a commitment to advancing these fields, and his collaborations with industry professionals further enhance his impact. Hirosawa's work continues to inspire future innovations.