Company Filing History:

8 out of 25,530

Sharp Kabushiki Kaisha Corporation

Tokyo Shibaura Denki Kabushiki Kaisha

patents

where one patent can have more than one assignee

Years Active: 1982-1994

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9 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5377053 - Magnetic reproduction apparatus for reproducing a video signal (1994-12-27),

2. 5355226 - Recording-reproduction apparatus applying double reset to the phase of (1994-10-11),

3. 5260838 - Magnetic reproducing apparatus for reproducing a video signal from a (1993-11-09),

4. 5168397 - Magnetic reproducing head amplifier (1992-12-01),

5. 5157359 - Carrier reset FM modulator and method of frequency modulating video (1992-10-20),

6. 5045950 - Circuit for detecting and compensating for jitter produced by a (1991-09-03),

7. 4955048 - Multiplex transmission of audio signal and video signal through inhouse (1990-09-04),

8. 4868815 - Power transmission system (1989-09-19),

9. 4340953 - Information recording medium and recording and reproducing system using (1982-07-20),

Title: Soichi Iwamura: Innovator in Magnetic Reproduction Technology

Introduction

Soichi Iwamura is a prominent inventor based in Fuchu, Japan. He holds a total of nine patents, showcasing his significant contributions to the field of magnetic reproduction technology. His innovative work has led to advancements in video signal reproduction, enhancing image quality and reducing distortion.

Latest Patents

One of Iwamura's latest patents is a magnetic reproduction apparatus designed for reproducing video signals. This apparatus utilizes a magnetic recording medium that records frequency-modulated signals produced by frequency-modulating a carrier with video signals. It includes a frequency converter that shifts the reproduced signals to a higher frequency region, along with a pulse-count-type FM demodulator that demodulates these signals into video signals. This design minimizes the mixing of reproduced signals, resulting in high-quality image reproduction with less waveform distortion.

Another notable patent is a magnetic recording-reproduction apparatus that records and reproduces wide-band video signals without a color burst signal. This invention employs a two-step phase resetting operation on the FM carrier, ensuring that the phases coincide with reference phases. A synchronizing panel clock generator produces reference signals that are phase-synchronous at the leading edge of the horizontal sync pulse. This arrangement effectively eliminates unwanted higher harmonic wave components and transient distortions, thereby improving overall image quality.

Career Highlights

Throughout his career, Soichi Iwamura has worked with notable companies, including Sharp Corporation and Nippon Hoso Kyokai. His experience in these organizations has contributed to his expertise in magnetic reproduction technology and video signal processing.

Collaborations

Iwamura has collaborated with several professionals in his field, including Hiroaki Nogami and Tadashi Itsumi. These collaborations have likely fostered innovation and the exchange of ideas, further enhancing the quality of his inventions.

Conclusion

Soichi Iwamura's contributions to magnetic reproduction technology have significantly impacted the quality of video signal reproduction. His innovative patents demonstrate his commitment to advancing this field, making him a noteworthy figure in the realm of inventions.

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