Keishi Yoshikawa

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Osaka, JP

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Patents Grantslast 30 patents

Information Patent Grant
Polarization optical article in which uneven coloring by polarizati...
- Patent number 9,507,176
- Issue date Nov 29, 2016
- Yamamoto Kogaku Co., Ltd.
- Nobuyuki Kobuchi
- G02 - OPTICS
Information Patent Grant
Fog-resistant structure and protective device for eyes
- Patent number 9,015,868
- Issue date Apr 28, 2015
- Yamamoto Kogaku Co., Ltd.
- Kimio Matsumoto
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Synthetic resin lens and eye lens article thereof
- Patent number 7,922,324
- Issue date Apr 12, 2011
- Yamamoto Kogaku Co., Ltd.
- Fumio Ishibashi
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE

Patents Applicationslast 30 patents

Information Patent Application
POLARIZATION OPTICAL ARTICLE IN WHICH UNEVEN COLORING BY POLARIZATI...
- Publication number 20120250142
- Publication date Oct 4, 2012
- Nobuyuki KOBUCHI
- G02 - OPTICS
Information Patent Application
CIRCULARLY POLARIZING PLATE AND CIRCULARLY POLARIZING LENS, AND CIR...
- Publication number 20110205627
- Publication date Aug 25, 2011
- YAMAMOTO KOGAKU CO., LTD.
- Nobuyuki KOBUCHI
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
FOG-RESISTANT STRUCTURE AND PROTECTIVE DEVICE FOR EYES
- Publication number 20110126345
- Publication date Jun 2, 2011
- YAMAMOTO KOGAKU CO., LTD.
- Kimio Matsumoto
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Application
POLARIZING LAMINATE AND PROCESS FOR PRODUCING THE SAME
- Publication number 20090305049
- Publication date Dec 10, 2009
- YAMAMOTO KOGAKU CO., LTD.
- Nobuyuki KOBUCHI
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Application
SYNTHETIC RESIN LENS AND EYE LENS ARTICLE THEREOF
- Publication number 20090296040
- Publication date Dec 3, 2009
- YAMAMOTO KOGAKU CO., LTD.
- Fumio Ishibashi
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Application
DOUBLE LENS
- Publication number 20090100577
- Publication date Apr 23, 2009
- YAMAMOTO KOGAKU CO., LTD.
- Hirokazu Kobayashi
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE