Location History:
- Kawasaki, JP (1986 - 1987)
- Shimotsuma, JP (1988)
Company Filing History:
Years Active: 1986-1988
Title: Innovative Contributions of Yoshimi Iijima
Introduction: Yoshimi Iijima is a notable inventor based in Kawasaki, Japan, recognized for her contributions to telecommunications technology. With a total of four patents to her name, Iijima's work has significantly impacted the way call signaling is managed and transmitted in modern telecommunication systems.
Latest Patents: Among Iijima's latest innovations is a call meter signal receiver designed for subscriber's private metering systems. This device operates by receiving call meter signals sent from a central office and can function in both common mode and normal mode signals. The compact receiver is suitable for installation in central office trunks of private branch exchange equipment. It comprises a frequency-tuned receiver with two buffer circuits: one for common mode and the other for normal mode signal reception. The frequency-tuned receiver can be adjusted to various frequencies, such as 50 Hz, 12 kHz, or 16 kHz, via an external circuit of capacitors and resistors.
Another significant patent is her calling signal transmission apparatus, which includes a ring trip equipment. This system detects ring trip signals in response to off-hook operations during intermittent ringing. The apparatus is equipped with a logical OR gate circuit to provide a status signal based on the detection of these signals. When a call is received and an off-hook state is detected, the apparatus can intelligently manage ringing signal transmission to ensure efficient communication.
Career Highlights: Yoshimi Iijima has built a commendable career at Fujitsu Corporation, engaging in cutting-edge telecommunications research and development. Her innovative approach to solving complex challenges in the field has earned her recognition among her peers.
Collaborations: Throughout her career, Iijima has worked alongside distinguished colleagues, including Kazuhiro Sato and Hiroyoshi Mori. Their collaborative efforts have contributed to the advancement of various technologies within the telecommunications sector.
Conclusion: Yoshimi Iijima's inventiveness and strategic thinking have solidified her place as a leading inventor in the telecommunications industry. Her patented innovations continue to enhance the efficiency of communication infrastructure, making a lasting impact on the industry and setting the stage for future advancements.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.