Seishi Watahiki

This inventor holds 7 USPTO granted patents. Top assignees: Hitachi, Ltd., Tokyo Gas Company Limited. Active years: 1977-1997.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Seishi Watahiki. Retrieved from https://idiyas.com/inventor/seishi-watahiki

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Calculating rank

USPTO Granted Patents = 7

% Patents Active = 100.0

Average Co-Inventor Count = 5.1

ph-index = 5

Forward Citations = 150(Granted Patents)

Location History:

Hitachi, JA (1977)
Katsuta, JP (1987 - 1997)

Company Filing History:

Tokyo Gas Company Limited

patents

where one patent can have more than one assignee

Years Active: 1977-1997

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7 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5640462 - Imaging method of X-ray computerized tomography and apparatus for X-ray (1997-06-17),

2. 4918283 - Method of and apparatus for conducting plasma welding (1990-04-17),

3. 4915349 - Gas governor apparatus and gas piping system (1990-04-10),

4. 4788409 - Method of and apparatus for automatically conducting all position plasma (1988-11-29),

5. 4770105 - Piping travelling apparatus (1988-09-13),

6. 4644791 - Moving apparatus for a hollow curved pipe-arrangement and an operating (1987-02-24),

7. 4037890 - Vertical type antifriction bearing device (1977-07-26),

Title: Seishi Watahiki: Innovator in Imaging and Welding Technologies

Introduction

Seishi Watahiki is a prominent inventor based in Katsuta, Japan. He has made significant contributions to the fields of imaging and welding technologies, holding a total of seven patents. His innovative work has had a lasting impact on various industries.

Latest Patents

Watahiki's latest patents include an imaging method for X-ray computerized tomography and an apparatus for X-ray. The imaging method involves reconstructing a partial region that includes a region of interest from penetrating data of an object. It extracts shape information from the reconstructed image and applies a threshold function determined by resolution to the image information. This process allows for the extraction and imaging of areas where the linear absorption coefficient distribution changes stepwise. Additionally, his plasma welding method includes pre-heating, tack welding, keyhole welding, and finish padding, all conducted automatically by a single plasma welding apparatus. This apparatus is programmed to optimize the conditions of operation based on the sizes and materials of the members being welded.

Career Highlights

Throughout his career, Watahiki has worked with notable companies such as Hitachi, Ltd. and Tokyo Gas Company Limited. His experience in these organizations has contributed to his expertise in developing advanced technologies.

Collaborations

Watahiki has collaborated with several professionals in his field, including Yasuzi Sakuma and Shinichi Kurita. These collaborations have further enhanced his innovative capabilities and contributions to technology.

Conclusion

Seishi Watahiki is a distinguished inventor whose work in imaging and welding technologies has led to significant advancements. His patents reflect his commitment to innovation and excellence in engineering.

Profile summary based on public USPTO records.

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]