This inventor holds 17 USPTO granted patents, plus 3 CIPO patents. Top assignees: Nec Corporation, Nippon Electric Co., Ltd.. Active years: 1984-1996.
Company Filing History:
Years Active: 1984-1996
Title: Innovations of Yoshio Ichikawa
Introduction
Yoshio Ichikawa is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of radio communication technology. With a total of 17 patents to his name, Ichikawa has developed innovative systems that enhance the efficiency and functionality of paging systems.
Latest Patents
One of his latest patents is a radio paging system that utilizes multiple transmitter stations. This global radio paging system synchronously modulates a plurality of radio frequency carriers with the same digital paging signal. The system includes a paging controller that receives calls through a public switched telephone network. It stores the maximum value of the sum of the paging request signal transmission time and the processing time in each base station. A high precision time signal is produced based on a reference signal from a GPS satellite. This innovation allows for the assignment of a transmission time that is delayed from the current time, ensuring efficient communication.
Another notable patent focuses on the transmission and reception of pager signals without unnecessary sampling. In this design, a pager receiver is equipped with a battery-saving switch and a receiving circuit. The controller manages the switch to receive portions of preamble signals and the entirety of synchronization and address signals from multiple pager signals. This method optimizes the power consumption of the device while maintaining effective communication.
Career Highlights
Yoshio Ichikawa has worked with notable companies such as NEC Corporation and Nippon Electric Co., Ltd. His experience in these organizations has contributed to his expertise in developing advanced communication technologies.
Collaborations
Ichikawa has collaborated with talented individuals in the field, including Takashi Ohyagi and Masaaki Akahori. Their combined efforts have led to the successful development of innovative technologies in radio communication.
Conclusion
Yoshio Ichikawa's contributions to the field of radio communication through his patents and collaborations highlight his role as a significant inventor. His work continues to influence the development of efficient communication systems.