Location History:
- Tokyo, JA (1977 - 1978)
- Tokyo, JP (1978 - 1988)
- Katsuta, JP (1989)
- Tsurugashima, JP (1997)
Company Filing History:
4 out of 68 
4 out of 180 
4 out of 58,132 
Years Active: 1977-1997
Title: Innovations of Koichi Sakai: A Pioneer in Electronic and Electric Machine Technology
Introduction
Koichi Sakai, a distinguished inventor based in Tokyo, Japan, has made significant contributions to the field of electronic and electric machine technology. With a remarkable portfolio comprising 14 patents, Sakai continues to influence the industry with his innovative designs and engineering solutions.
Latest Patents
Among Koichi Sakai’s latest inventions is an **Electronic tuning circuit for an AM receiver**. This circuit allows for the selection of a specific frequency from the signal input by an antenna. It features a tuning transformer with two windings, where the first winding has more turns than the second. Additionally, the circuit contains two varactor diodes that enhance frequency tuning, offering improved performance for AM radio receivers.
Another notable patent is the **Salient-pole rotary electric machine**, which emphasizes efficiency and cooling. This machine includes a stator with ventilation ducts and a stator winding, alongside a rotor featuring salient field poles. The innovative design incorporates closure members within the cooling passages between the poles, which significantly reduces mechanical losses and ensures uniform cooling across the stator's entire length.
Career Highlights
Koichi Sakai’s career includes impactful roles in companies such as Toko Kabushiki Kaisha and Toko, Inc., where he has played a crucial role in advancing electronic technologies. His expertise has enabled the development of state-of-the-art products that serve myriad applications in the electronics market.
Collaborations
Throughout his career, Sakai has collaborated with notable industry professionals, including Satoru Horie and Yasuyuki Ohmichi. Their collective expertise has contributed to the advancement of innovative technologies and patent registrations that fortify the engineering domain.
Conclusion
Koichi Sakai stands out as a prominent figure in the realm of inventions, renowned for his inventive patents in electronic tuning and rotary electric machinery. His dedication to innovation has not only furthered technological progress but has also inspired future generations of engineers and inventors. As his body of work continues to grow, it is clear that Sakai's contributions will have a lasting impact on the industry.