Location History:
- Gumma, JP (1989)
- Kamakura, JP (1991 - 1993)
Company Filing History:
3 out of 21,351 
1 out of 10 Years Active: 1989-1993
Title: Innovations of Tatsuhiko Mizushima
Introduction
Tatsuhiko Mizushima is a notable inventor based in Kamakura, Japan. He has made significant contributions to the field of video telephone technology, holding a total of 3 patents. His work focuses on improving the transmission and reception of video signals over telephone lines.
Latest Patents
Mizushima's latest patents include a "Method and apparatus for static video telephone transmission/receiving." This invention involves a static video telephone that captures images and transmits video signals over a telephone line. The video signal is designed with a frame format that includes phase shift correction data, frame synchronization signals, amplitude calibration signals, ID signals, and image data signals. The device features a frequency shift correction data generating circuit that activates upon detecting frequency shifts in the received signal, producing necessary correction data for effective demodulation.
Another significant patent is the "Still image video telephone transmission system." This system allows for the transmission and reception of still pictures taken by a camera via a telephone line. The transmitting circuit sends picture element signals along with image correcting signals to ensure that the still picture is displayed clearly and without distortion. The receiving circuit detects these correcting signals and makes the necessary adjustments for optimal image quality.
Career Highlights
Mizushima has worked with prominent companies such as Mitsubishi Denki Kabushiki Kaisha and Mitsubishi Electronics America, Inc. His experience in these organizations has contributed to his expertise in video technology and innovation.
Collaborations
Mizushima has collaborated with notable individuals in his field, including Koji Kaneko and Kazuyuki Saigusa. Their joint efforts have likely enhanced the development of his inventions and patents.
Conclusion
Tatsuhiko Mizushima's contributions to video telephone technology demonstrate his innovative spirit and technical expertise. His patents reflect a commitment to improving communication methods through advanced technology.