Company Filing History:

14 out of 1,267

Hitachi Koki Co., Ltd.

patents

1 out of 42,485

Hitachi, Ltd.

patents

2 out of 832,680

Other

patents

where one patent can have more than one assignee

Years Active: 1980-1991

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16 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5006704 - Optical scanner and method for generating and detecting a composite dot (1991-04-09),

2. 4949096 - Laser printer with thermal fixing of toner (1990-08-14),

3. 4926200 - Electrophotographic printer (1990-05-15),

4. 4910555 - Electrophotographic device with controlled exposed potential (1990-03-20),

5. 4479430 - System of discriminating the kinds of type carriers (1984-10-30),

6. 4475807 - Cleaning apparatus for xerographic printing apparatus (1984-10-09),

7. 4473006 - System for discriminating among different kinds of type carriers (1984-09-25),

8. 4469453 - Rotary multi-mirror driving motor (1984-09-04),

9. 4405922 - Failure detection circuit for impact printers or the like (1983-09-20),

10. 4355393 - Microcomputer having a ram for storing parity bits (1982-10-19),

11. 4300085 - Failure detection method and circuit for stepping motors (1981-11-10),

12. 4286517 - Printer magnetic interference prevention system (1981-09-01),

13. 4278021 - Magnetic interference prevention system (1981-07-14),

14. 4254705 - Printing magnet drive device (1981-03-10),

15. 4236447 - Printing column number limiting device (1980-12-02),

Title: Shigenobu Katagiri: Innovator in Optical Scanning and Laser Printing

Introduction

Shigenobu Katagiri is a prominent inventor based in Katsuta, Japan. He holds a total of 16 patents, showcasing his significant contributions to the fields of optical scanning and laser printing technology. His innovative work has paved the way for advancements in these areas, making him a notable figure in the industry.

Latest Patents

Among his latest patents is an optical scanner and method for generating and detecting a composite dot. This invention involves directing light beams from multiple sources onto a medium to create a composite spot. The relative positions of the beams can be detected and adjusted to modify the diameter of the composite spot, ensuring that lines formed by these spots appear unbroken. Additionally, the modulating times, intensities, and number of sources can be varied to establish a linear relationship between the dither matrix and the picture element density. Another significant patent is for a laser printer with thermal fixing of toner. This printer features a thermal fixing unit that includes heat and pressure rolls to fix a developed toner image onto a sheet. It also incorporates an oil coater that applies oil to a web, preventing toner image offset during the printing process.

Career Highlights

Shigenobu Katagiri has worked with notable companies, including Hitachi Koki Co., Ltd. His experience in these organizations has contributed to his expertise and the development of his innovative patents.

Collaborations

Throughout his career, Katagiri has collaborated with talented individuals such as Hiroshige Nakano and Hiroomi Kozawa. These collaborations have likely enriched his work and led to further advancements in technology.

Conclusion

Shigenobu Katagiri's contributions to optical scanning and laser printing technologies are significant, with multiple patents that reflect his innovative spirit. His work continues to influence the industry and inspire future advancements.

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