Location History:
- Kyoto, JP (1991)
- Nagaokakyo, JP (1989 - 1997)
Company Filing History:
7 out of 21,351 
1 out of 26 
Years Active: 1989-1997
Title: The Innovative Mind of Keiji Hatanaka
Introduction: Keiji Hatanaka is a distinguished inventor based in Nagaokakyo, Japan, known for his groundbreaking contributions to the field of magnetic recording technology. With a remarkable total of 8 patents, Hatanaka exemplifies the spirit of innovation in a highly competitive industry.
Latest Patents: Among Hatanaka's notable inventions is a method and apparatus for following curved tracks on a tape. This invention employs a magnetic head carried by a piezo-electric movable element, allowing for precise detection of the magnetic head's position to maximize reproduction signals. The innovation ensures high-quality reproduction images, even from magnetic tapes with varying record levels, while adapting seamlessly to changing track curvatures. Another significant patent is the inversion prevention device that enhances the signal-to-noise ratio (S/N ratio). This device identifies points where zero crossings are absent in a quantized FM signal and switches outputs based on inversion detection, demonstrating Hatanaka's ingenuity in optimizing signal processing.
Career Highlights: Hatanaka's career includes significant tenures at Mitsubishi Denki (Mitsubishi Electric Corporation) and Mitsubishi Denki Kabushiki Kaisha. His experience in these prominent companies helped shape his expertise in electronic engineering and patent development.
Collaborations: Throughout his illustrious career, Hatanaka has collaborated with various skilled professionals, including his coworkers Takahiro Nakai and Yoshiko Hatano. Their teamwork likely contributed to the refined innovations that emerged from Hatanaka's inventive process.
Conclusion: Keiji Hatanaka stands out as a prominent figure in the realm of technological innovation, particularly in magnetic recording and signal processing. His inventive solutions not only address current challenges in the industry but also pave the way for future advancements. With a total of 8 patents under his name, Hatanaka's legacy as an inventor continues to inspire future generations in the field of engineering.