Location History:
- Hirakata, JP (1988 - 2004)
- Osaka, JP (1991 - 2004)
Company Filing History:
Years Active: 1988-2004
Title: Hiroshi Yohda: Innovator in Magnetic Recording Technology
Introduction
Hiroshi Yohda is a prominent inventor based in Hirakata, Japan. He has made significant contributions to the field of magnetic recording technology, holding a total of 13 patents. His work has greatly influenced the development of recording devices, particularly in the area of video technology.
Latest Patents
One of his latest patents is the "Recording head clogging detection method and its device." This innovative device is designed for use in video tape recorders (VTRs) to monitor the recording state of a recording head without relying on the reproducing head. The method involves recording a test signal of a lower frequency than the erasing frequency before and after an information signal. By reproducing this test signal and comparing the output level with a preset threshold, the device can issue a warning if the level falls below the preset level, thereby preventing recording failures due to head clogging.
Another notable patent is the "Magnetic recording and reproducing apparatus of helical scan type." This apparatus is capable of recording and reproducing compressed video data in one of two formats. The first format records the compressed video data across multiple tracks on a magnetic tape, while the second format allows for the recording of auxiliary data in two tracks at both ends, with the compressed video data occupying the remaining tracks. This dual-format capability enhances the efficiency and reliability of video data storage.
Career Highlights
Hiroshi Yohda has spent a significant portion of his career at Matsushita Electric Industrial Co., Ltd., where he has been instrumental in advancing magnetic recording technologies. His innovative approaches have led to the development of devices that improve the reliability and quality of video recording.
Collaborations
Throughout his career, Yohda has collaborated with notable colleagues, including Ken Takahashi and Yoshiaki Mizoh. These collaborations have fostered a creative environment that has resulted in several groundbreaking inventions in the field of magnetic recording.
Conclusion
Hiroshi Yohda's contributions to magnetic recording technology have established him as a key figure in the industry. His innovative patents and collaborative efforts continue to influence the development of advanced recording devices.
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