Inventor · disambiguated record
Keishi Akiyama
Also filed as: AKIYAMA KEISHI
0 granted patents·5 pending applications·0 citations·filing 2019–2022
Files withHOYA CORP5
Top patents by PatentIndex Score
5 records- 0156US2023194973A1Mask blank, phase shift mask, method of manufacturing phase shift mask, and method of manufacturing semiconductor deviceHOYA CORP·Filed 2021·Application pending·0 cites
- 0255US2023097280A1Mask blank, transfer mask, and method for manufacturing semiconductor deviceHOYA CORP·Filed 2021·Application pending·0 cites
- 0355US2024361683A1Mask blank and phase shift maskHOYA CORP·Filed 2022·Application pending·0 cites
- 0445US2022043335A1Mask blank, transfer mask, and semiconductor-device manufacturing methodHOYA CORP·Filed 2019·Application pending·0 cites
- 0545US2022035235A1Mask blank, transfer mask, and semiconductor-device manufacturing methodHOYA CORP·Filed 2019·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →