Inventor
Katsuhisa Itoh
Inventor
Tokyo, JP
Overview
Patents· 13 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C03Cprimary
C03CChemical composition of glasses, glazes or vitreous enamels27%
C25CProcesses for the electrolytic production, recovery or refining of metals23%
H01SDevices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light23%
C03BManufacture, shaping, or supplementary processes9%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests9%
C22BProduction and refining of metals5%
G02BOptical elements, systems or apparatus5%
PatentTitleYear
6,798,792'Laser device and light signal amplifying device using the same'20046,795,460'Laser device and an optical signal amplifier using thereof'20046,533,883'Method of manufacturing optical medium'20036,053,012'Method for manufacturing glass preform and glass fiber'20006,042,739'Etchant and method for etching chalcogenide glass and optical member having smooth surface'20005,917,108'Drawing a chalcogenide glass fiber in a sulfur atmosphere'19995,856,882'Optical fibers and optical fiber amplifiers'19995,764,661'Laser glasses and laser glass fibers'19984,783,245'Process and apparatus for producing alloy containing terbium and/or gadolinium'19884,747,924'Apparatus for producing neodymium-iron alloy'19884,737,248'Process for producing dysprosium-iron alloy and neodymium-dysprosium-iron alloy'19884,684,448'Process of producing neodymium-iron alloy'19874,521,284'Electrolytic method of producing a high purity aluminum-lithium mother alloy'1985Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1985–1988Patents assigned to SUMITOMO LIGHT METAL IND (5)· patent assignee history
1985–1988Based in Nagoya, JP· patent location history
1998–2004Patents assigned to HOYA CORP (7)· patent assignee history
1998–2004Based in Ome, JP· patent location history
1999–2004Based in Tokyo, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HOYA CORP | 7 | 1998–2004 |
| SUMITOMO LIGHT METAL IND | 5 | 1985–1988 |
Locations
| Location | Patents | Span |
|---|---|---|
| Tokyo, JP | 5 | 1999–2004 |
| Nagoya, JP | 5 | 1985–1988 |
| Ome, JP | 3 | 1998–2004 |