Inventor
TAKAHASHI HIROTOSHI
JP28 patents
⚠️ This page may combine multiple inventors who share the name “TAKAHASHI HIROTOSHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
TOKAI OPTICAL CO LTD
12 patentsUS10031349B2Jul 24, 2018
Optical product, and spectacle lens and spectacles
TOKAI OPTICAL CO LTD2 citations72
US11966102B2Apr 23, 2024
Spectacle lens and spectacles
TOKAI OPTICAL CO LTD0 citations62
US8908275B2Dec 9, 2014
Optical product and spectacle plastic lens
TOKAI OPTICAL CO LTD3 citations61
US11422287B2Aug 23, 2022
Plastic spectacle lens and spectacles
TOKAI OPTICAL CO LTD0 citations52
US12571941B2Mar 10, 2026
Plastic optical product and plastic spectacle lens
TOKAI OPTICAL CO LTD0 citations51
US11709292B2Jul 25, 2023
Optical plastic product, and plastic spectacle lens and spectacles
TOKAI OPTICAL CO LTD0 citations51
US11668957B2Jun 6, 2023
Optical product, plastic spectacle lens, and spectacles
TOKAI OPTICAL CO LTD0 citations51
US10107941B2Oct 23, 2018
Optical product, and spectacle lens and spectacles
TOKAI OPTICAL CO LTD0 citations51
US9651713B2May 16, 2017
Optical product and spectacle plastic lens
TOKAI OPTICAL CO LTD1 citations51
US9022561B2May 5, 2015
Plastic optical product and plastic lens for spectacles
TOKAI OPTICAL CO LTD1 citations49
US10663634B2May 26, 2020
ND filter with plastic base material, and ND filter with plastic base material for eyeglasses
TOKAI OPTICAL CO LTD0 citations41
US10101502B2Oct 16, 2018
Optical product and spectacle lens
TOKAI OPTICAL CO LTD0 citations41
SHOWA DENKO KK
3 patentsUS6184328B1Feb 6, 2001
Propylene-based polymer, method for its production, composition thereof, catalyst component for polymerization, and method for its production
SHOWA DENKO KK30 citations91
US6323298B1Nov 27, 2001
Propylene-based polymer, method for its production, composition thereof, catalyst component for polymerization, and method for its production
SHOWA DENKO KK13 citations72
US5916990AJun 29, 1999
Propylene-based polymer, method of its production, composition thereof, catalyst component for polymerization, and method for its production
SHOWA DENKO KK14 citations72