Company Filing History:
3 out of 42,508 
3 out of 9 Years Active: 1990-1992
Title: The Innovations of Fusao Nakagawa
Introduction
Fusao Nakagawa is a notable inventor based in Yokohama, Japan. He has made significant contributions to the field of microcomputer technology, particularly in the area of data encryption and decryption. With a total of three patents to his name, Nakagawa's work has had a lasting impact on secure communications.
Latest Patents
Among his latest patents are the encipher method and decipher method. These methods provide a high-speed solution for enciphering message data generated by microcomputers using encipher keys stored in smart cards. The decipher method allows for the rapid decryption of ciphertext created by the encipher method, utilizing the same encipher keys. These methods are particularly suitable for 32-bit microcomputers and incorporate a process defined by the function Rot.sub.2 i(x), where i can be 2, 3, or 4. This function enables the circular shifting of a 32-bit data train to the left or right by 2 raised to the power of i bits.
Career Highlights
Fusao Nakagawa has had a distinguished career, working with prominent companies such as Hitachi, Ltd. and Hitachi Control Systems, Inc. His experience in these organizations has allowed him to develop and refine his innovative ideas in the field of technology.
Collaborations
Throughout his career, Nakagawa has collaborated with esteemed colleagues, including Kazuo Takaragi and Ryoichi Sasaki. These partnerships have contributed to the advancement of his inventions and the successful implementation of his patented methods.
Conclusion
Fusao Nakagawa's contributions to the field of microcomputer technology and data encryption are noteworthy. His innovative encipher and decipher methods demonstrate his expertise and commitment to advancing secure communication technologies. His work continues to influence the industry and inspire future innovations.