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For the Inventor, By the Inventor

Yokohama, Japan

Tohru Sampei

USPTO Granted Patents = 17

Average Co-Inventor Count = 2.5

ph-index = 10

Forward Citations = 323(Granted Patents)


Location History:

  • Toyokawa, JA (1976 - 1978)
  • Toyokawa, JP (1978)
  • Yokohoma, JP (1983)
  • Yokohama, JP (1979 - 1985)
  • Kanagawa, JP (1985 - 1989)
  • Naka, JP (1992)

Company Filing History:

goldMedal17 out of 42,485 
 
Hitachi, Ltd.
 patents
silverMedal1 out of 522 
 
Nippon Telegraph and Telephone Public Corporation
 patents
where one patent can have more than one assignee

Years Active: 1976-1992

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17 patents (USPTO):Explore Patents
1. 5084786 - Magnetic tape memory apparatus with axially displaced heads enabling (1992-01-28),
2. 4796140 - Removable disk construction (1989-01-03),
3. 4613920 - Magnetic head for magnetic disk (1986-09-23),
4. 4551777 - Tracking servo system for magnetic recording and reproducing apparatus (1985-11-05),
5. 4491958 - Speech synthesizer (1985-01-01),
6. 4443741 - Drive circuit for electroluminescent element (1984-04-17),
7. 4435832 - Speech synthesizer having speech time stretch and compression functions (1984-03-06),
8. 4422109 - Magnetic recording and reproducing apparatus automatically adjustable to (1983-12-20),
9. 4422108 - Tape recorder (1983-12-20),
10. 4401971 - Alarm device for a vehicle including priority control for plural alarm (1983-08-30),
11. 4390747 - Speech analyzer (1983-06-28),
12. 4168471 - Source follower circuit using FETs (1979-09-18),
13. 4163197 - Audio-frequency power amplifier (1979-07-31),
14. 4100501 - Audio frequency power amplifier (1978-07-11),
15. 4068187 - Audio-frequency power amplifiers (1978-01-10),

Title: Tohru Sampei: Innovator in Magnetic Tape Technology

Introduction

Tohru Sampei is a notable inventor based in Yokohama, Japan. He has made significant contributions to the field of magnetic tape technology, holding a total of 17 patents. His work has influenced various applications in data storage and retrieval systems.

Latest Patents

Among his latest patents is a magnetic tape memory apparatus featuring axially displaced heads. This innovative design includes a helical scan tape apparatus with a first pair of magnetic heads positioned at different azimuth angles on a rotary drum. The second pair of magnetic heads is arranged perpendicularly to the first, allowing for efficient data recording and reproduction. Another notable patent is for a removable disk construction, which includes a recording and reproducing sheet secured to a hard material hub. This design ensures that even thin magnetic sheets are protected from damage during operation.

Career Highlights

Tohru Sampei has worked with prominent companies such as Hitachi, Ltd. and Nippon Telegraph and Telephone Public Corporation. His experience in these organizations has allowed him to develop and refine his innovative ideas in magnetic tape technology.

Collaborations

Throughout his career, Tohru has collaborated with notable individuals, including Shigemitsu Higuchi and Tadashi Saito. These partnerships have contributed to the advancement of his inventions and the overall progress in the field.

Conclusion

Tohru Sampei's contributions to magnetic tape technology have established him as a significant figure in the field of innovation. His patents reflect a deep understanding of data storage mechanisms and continue to influence modern technology.

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