Inventor

SEGAWA TOSHIKAZU

JP8 patents

⚠️ This page may combine multiple inventors who share the name “SEGAWA TOSHIKAZU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

DAINIPPON PRINTING CO LTD

7 patents

US6667819B2Dec 23, 2003

Reflection type diffuse hologram, hologram for reflection hologram color filters, etc., and reflection type display device using such holograms

DAINIPPON PRINTING CO LTD47 citations95

US5543228AAug 6, 1996

Molded relief hologram

DAINIPPON PRINTING CO LTD32 citations92

US6214495B1Apr 10, 2001

Phase mask for processing optical fibers and method of manufacturing the same

DAINIPPON PRINTING CO LTD41 citations91

US6200711B1Mar 13, 2001

Phase mask for manufacturing diffraction grating, and method of manufacture

DAINIPPON PRINTING CO LTD38 citations91

US6033810AMar 7, 2000

Molded articles using glass as substrate, such as holographic optical element, optical reflector and encoder, and method of producing these articles

DAINIPPON PRINTING CO LTD8 citations73

US7215451B1May 8, 2007

Reflection type diffuse hologram, hologram for reflection hologram color filters, etc., and reflection type display device using such holograms

DAINIPPON PRINTING CO LTD4 citations62

US6795614B2Sep 21, 2004

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

DAINIPPON PRINTING CO LTD1 citations50

DAI NIPPON PRINTING CO LTD AND

1 patent

US6466714B1Oct 15, 2002

Method of producing phase mask for fabricating optical fiber and optical fiber with bragg's diffraction grating produced by using the phase mask

DAI NIPPON PRINTING CO LTD AND4 citations55