Tokyo Ohka Kogyo

Manufacturer of photoresists and semiconductor manufacturing materials

placeKawasaki, Kanagawa Prefecture, Japan calendar_todayFounded 1945 groups2,066 employees language tok.co.jp

Innovation

3,735 patent families (1,514 granted) — focus: Physics & computing, Chemistry & metallurgy, Electricity & electronics, Operations & transport; filing pace steady. Cited 60,204 times.

YearFilings
2015328
2016330
2017370
2018299
2019269
2020251
2021293
2022301
2023307
2024359
2025378
202690
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