Inventor
Yoshiyuki Asahara
Inventor
Tokyo, JP
Overview
Patents· 21 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 enamels45%
G02BOptical elements, systems or apparatus20%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests18%
C03BManufacture, shaping, or supplementary processes8%
G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein5%
G03CPhotosensitive materials for photographic purposes3%
G11BInformation storage based on relative movement between record carrier and transducer3%
PatentTitleYear
5,125,944'Process for producing buried wave guide device'19925,122,178'Process for producing glass doped with dispersed microcrystallites'19925,078,772'Process for producing buried waveguide device'19925,043,003'Process for producing glass doped with dispersed mirocrystallites'19914,902,330'Method of producing gradient-index lens'19904,851,024'Process for producing optical glass'19894,844,589'Lenses having plural contiguous refractive index distribution substrates and method of manufacture'19894,844,724'Method of adjusting refractive index distribution lenses'19894,805,997'Gradient refractive index type anamorphic planar microlens and method of producing the same'19894,767,435'Process for producing transparent glass product having refractive index gradient'19884,640,699'Process for producing glass product having gradient of refractive index'19874,563,205'Process for the production of slab-shaped lens having gradient of refractive index in thickness direction only'19864,525,189'Process for producing glass product having gradient of refractive index'19854,415,464'Faraday rotation glass'19834,165,989'Faraday rotation glass'19794,108,621'Process of producing soft aperture filter'19784,060,422'Sealing glass for glass laser'19774,042,526'Non-crystalline substance having an optical memory effect'19773,971,723'Glass for Faraday rotator element'19763,966,448'Sealing method for laser glass'19763,966,447'Heat absorbing sealing method for laser glass'1976Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1976–1978Patents assigned to HOYA GLASS WORKS LTD (5)· patent assignee history
1976Based in Kanagawa, JP· patent location history
1977–1992Patents assigned to HOYA CORP (16)· patent assignee history
1977–1987Based in Higashiyamato, JP· patent location history
1986–1990Based in Tokyo, JP· patent location history
1989–1992Based in Mizuho, JP· patent location history
1991–1992Based in Nishitama-gun, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HOYA CORP | 16 | 1977–1992 |
| HOYA GLASS WORKS LTD | 5 | 1976–1978 |
Locations
| Location | Patents | Span |
|---|---|---|
| Tokyo, JP | 6 | 1986–1990 |
| Higashiyamato, JP | 6 | 1977–1987 |
| Mizuho, JP | 3 | 1989–1992 |
| Kanagawa, JP | 3 | 1976 |
| Nishitama-gun, JP | 2 | 1991–1992 |