Inventor
YAMASHITA TOSHIHARU
25 patents
⚠️ This page may combine multiple inventors who share the name “YAMASHITA TOSHIHARU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HOYA CORP
18 patentsUS4521524AJun 4, 1985
Contrast enhancement filter for color CRT display devices
HOYA CORP115 citations96
US6777359B2Aug 17, 2004
Polarizing glass and preparation method thereof
HOYA CORP25 citations92
US5185021AFeb 9, 1993
Method of manufacturing preform for nonoxide glass fiber
HOYA CORP21 citations92
US4871230AOct 3, 1989
Single mode phosphate laser glass fiber
HOYA CORP27 citations92
US4303298ADec 1, 1981
Near infrared absorption filter for color television cameras
HOYA CORP44 citations92
US4288250ASep 8, 1981
Glass filter for contrast enhancement in CRT displays
HOYA CORP46 citations92
US6074968AJun 13, 2000
Chalcogenide glass fiber
HOYA CORP28 citations91
US5958103ASep 28, 1999
Process for producing preform for glass fiber and process for producing glass fiber
HOYA CORP34 citations91
US4444616AApr 24, 1984
Method for exposure of chemically machinable light-sensitive glass
HOYA CORP39 citations89
US4110245AAug 29, 1978
Green colored filter glass
HOYA CORP25 citations82
US4105577AAug 8, 1978
Filter glass
HOYA CORP20 citations82
US4806138AFeb 21, 1989
Method for melting fluorophosphate glass
HOYA CORP13 citations74
US4794435ADec 27, 1988
Photochromatic gradient lens having two colortones and process for producing same
HOYA CORP9 citations74
US4726652AFeb 23, 1988
Faraday rotation single-mode optical fiber
HOYA CORP13 citations73
US4761387AAug 2, 1988
Fluoride glass
HOYA CORP10 citations71
US4390391AJun 28, 1983
Method of exposure of chemically machineable light-sensitive glass
HOYA CORP15 citations70
US4305757ADec 15, 1981
Antiblurring glass
HOYA CORP4 citations63
US4845057AJul 4, 1989
Halide glass
HOYA CORP5 citations60
HOYA GLASS WORKS LTD
4 patentsUS3941605AMar 2, 1976
Reversible light-sensitive glass
HOYA GLASS WORKS LTD19 citations82
US4001019AJan 4, 1977
Reversible light sensitive glass
HOYA GLASS WORKS LTD18 citations73
US3998647ADec 21, 1976
Reversible light-sensitive glass
HOYA GLASS WORKS LTD16 citations73
US4043852AAug 23, 1977
Anomalous dispersion glass exhibiting the anomalous partially dispersing property in the long wave length region
HOYA GLASS WORKS LTD2 citations56