Company Filing History:
Years Active: 1993-2004
Title: Tatsuzi Shigeta: Innovator in Portable Telephone Technology
Introduction
Tatsuzi Shigeta is a notable inventor based in Kawasaki, Japan. He has made significant contributions to the field of portable telephone technology, holding a total of 3 patents. His innovative designs have paved the way for advancements in mobile communication devices.
Latest Patents
One of Shigeta's latest patents is for a portable telephone that features a multi-function key-switch unit. This unit allows the key top to be operated in multiple directions, enhancing user interaction. The design includes a stick switch with a cylindrical key top that has a stopper portion to prevent excessive inclination during use.
Another significant patent involves a hinge mechanism for foldable portable telephones. This mechanism supports a foldable lid that can rotate between opened and closed positions. It incorporates two springs that generate biasing forces to facilitate smooth operation. The design also includes stoppers that restrict the rotation of the shaft, ensuring the lid functions effectively in both directions.
Career Highlights
Tatsuzi Shigeta is currently employed at Fujitsu Corporation, where he continues to innovate in the field of telecommunications. His work has been instrumental in developing user-friendly mobile devices that cater to the needs of consumers.
Collaborations
Shigeta has collaborated with several talented individuals in his field, including Masashi Tomura and Kenji Tajima. Their combined expertise has contributed to the successful development of various technologies in portable communication.
Conclusion
Tatsuzi Shigeta's contributions to portable telephone technology highlight his innovative spirit and dedication to improving mobile communication. His patents reflect a commitment to enhancing user experience and functionality in telecommunications.