Inventor
Seishi Watahiki
Inventor
Katsuta, JP
Overview
Patents· 7 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
B23Kprimary
B23KSoldering or unsoldering15%
F04DNon-positive-displacement pumps8%
F16CShafts8%
F16LPipes8%
F16NLubricating8%
G01MTesting static or dynamic balance of machines or structures8%
G01NInvestigating or analysing materials by determining their chemical or physical properties8%
G05DSystems for controlling or regulating non-electric variables8%
G06TImage data processing or generation, in general8%
G21CNuclear reactors8%
PatentTitleYear
5,640,462'Imaging method of X-ray computerized tomography and apparatus for X-ray computerized tomography'19974,918,283'Method of and apparatus for conducting plasma welding'19904,915,349'Gas governor apparatus and gas piping system'19904,788,409'Method of and apparatus for automatically conducting all position plasma welding of pipes'19884,770,105'Piping travelling apparatus'19884,644,791'Moving apparatus for a hollow curved pipe-arrangement and an operating method in the pipe-arrangement by using the moving apparatus'19874,037,890'Vertical type antifriction bearing device'1977Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1977–1997Patents assigned to HITACHI LTD (7)· patent assignee history
1977Based in Hitachi, JP· patent location history
1987–1997Based in Katsuta, JP· patent location history
1988Patents assigned to TOKYO GAS CO LTD (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HITACHI LTD | 7 | 1977–1997 |
| TOKYO GAS CO LTD | 1 | 1988 |
Locations
| Location | Patents | Span |
|---|---|---|
| Katsuta, JP | 6 | 1987–1997 |
| Hitachi, JP | 1 | 1977 |