Inventor
Toshikazu Segawa
Inventor
Tokyo, JP
Overview
Patents· 8 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G02Bprimary
G02BOptical elements, systems or apparatus24%
G03FPhotomechanical production of textured or patterned surfaces, e.g. for printing, for processing of semiconductor devices16%
G03HHolographic processes or apparatus16%
B32BLayered products, i.e. products built-up of strata of flat or non-flat, e.g. cellular or honeycomb, form8%
C03CChemical composition of glasses, glazes or vitreous enamels8%
G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein8%
G11BInformation storage based on relative movement between record carrier and transducer8%
Y10TTechnical subjects covered by former us classification8%
H01JElectric discharge tubes or discharge lamps4%
PatentTitleYear
7,215,451'Reflection type diffuse hologram, hologram for reflection hologram color filters, etc., and reflection type display device using such holograms'20076,795,614'Method of making phase mask for machining optical fiber and optical fiber having bragg diffraction grating produced using the phase mask for machining optical fiber'20046,667,819'Reflection type diffuse hologram, hologram for reflection hologram color filters, etc., and reflection type display device using such holograms'20036,466,714'Method of producing phase mask for fabricating optical fiber and optical fiber with bragg\'s diffraction grating produced by using the phase mask'20026,214,495'Phase mask for processing optical fibers and method of manufacturing the same'20016,200,711'Phase mask for manufacturing diffraction grating, and method of manufacture'20016,033,810'Molded articles using glass as substrate, such as holographic optical element, optical reflector and encoder, and method of producing these articles'20005,543,228'Molded relief hologram'1996Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1996–2007Patents assigned to DAINIPPON PRINTING CO LTD (7)· patent assignee history
1996–2007Based in Tokyo, JP· patent location history
2002Patents assigned to DAI NIPPON PRINTING CO LTD AND (1)· patent assignee history
2004Patents assigned to NIPPON TELEGRAPH & TELEPHONE (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| DAINIPPON PRINTING CO LTD | 7 | 1996–2007 |
| DAI NIPPON PRINTING CO LTD AND | 1 | 2002 |
| NIPPON TELEGRAPH & TELEPHONE | 1 | 2004 |
Locations
| Location | Patents | Span |
|---|---|---|
| Tokyo, JP | 8 | 1996–2007 |