Number of patents


This is a report on the aggregated number of granted patents possessed by SEL. The number of patents by country of application and the patent share in Japan and the US were counted and shown by fields SEL is focusing. More than 10,000 patents related to oxide semiconductors, 900 patents related to rechargeable battery, and 7,000 patents related to organic electroluminescence have been granted worldwide.
We will continue to obtain patents to spread our technology throughout the world.


Distribution of number of patents registered by country




SEL’s Patent Share


Oxide Semiconductor



Rechargeable Battery



OLED




*Pie charts
The pie charts were made by SEL based on information as of March 2021. Patents capable of being utilized in several fields were counted in the respective fields.

<How to obtain statistical data>
Patents Related to Oxide Semiconductor
(1) Search engine: ULTRA Patent
(2) Search formula: Initial search ((i) and (ii)) was performed under the keywords shown below and then the resulted group had been individually evaluated and categorized.
● Japanese applied patents or registered patents
(i) 請求項: (酸化物半導体or アモルフアス酸化物or 非晶質酸化物or 金属酸化物or 酸化亜鉛or zno or (in and ga and zn)
or (in and ga) or (in and zn) or (ga and zn) or (インジウムand ガリウムand 亜鉛) or (インジウムand ガリウム)
or (インジウムand 亜鉛) or (ガリウムand 亜鉛) or igzo or gizo)
(ii) 明細書: (トランジスタor tft or fet)
● US applied patens or registered patents
(i) scope of claims: “oxide semiconductor” or “amorphous oxide” or “ZnO” or “zinc oxide” or “Zn” or “zinc” or (“indium” and
"gallium") or "semiconducting oxide" or "semiconducting thin film oxide" or "igzo" or "gizo"
(ii) specification: "transistor" or "TFT" or "FET“

Patents Related to Rechargeable Battery
(1) Search engine: ULTRA Patent
(2) Search formula
● Japanese applied patents or registered patents
ICH=(H01M) NOT ICH=(H01M-008/00) NOT TI=(水素 OR 太陽 OR 光電変換 OR 鉛 OR アルカリ OR 空気 OR 一次電池 OR 工具 OR ヒューズ OR 燃料 OR 受電 OR 給電 OR 送電 OR (キャパシタ NOT (キャパシタ AND (バッテリ OR 電池)))) NOT TAC=(色素) AND AD>=2010
● US applied patens or registered patents
ICH=(H01M) NOT ICH=(H01M-008/00) NOT TI=(“hydride*” OR “solar*” OR “photoele* conver*” OR “lead-acid” OR “alkaline*” OR “air*” OR “primary batter*” OR “tool*” OR “fuse*” OR “cigarette*” OR “fuel*” OR “receiv* power*” OR “power suppl*” OR “power transmis*” OR (“capacit*” NOT (“capacit*” and “batter*”))) NOT TAC=(“pigment*”) AND AD>=2010
The pie charts are generated based on data filtered by time period, from 2010, when SEL started R/D in this space, to March 2021.

Patents Related to OLED
(1) Search engine: ULTRA Patent
(2) Search formula
Search ((i) and (ii) not (iii)) was performed under the keywords shown below .
● Japanese applied patents or registered patents
(i) claims: (("化合物" and "式") or "発光素子" or "発光層" or "EL層" or "EL素子" or "EL材料"or "エレクトロルミネ?層" or "誘導体" or "ルミネ?層*" or
"有機金属錯体"or "有機金属化合物" or "OLED" or "ELディスプレイ")
(ii) specification: (("OLED" or "有機化合物" or "有機材料" or "有機発光ダイオード" or "有機エレクトロルミネ?"or "有機電界発光" or "有機発光素子")
and ("発光素子" or "エレクトロルミネ?" or "発光材料" or "電界発光"or"発光層" or "EL ディスプレイ"))
(iii) specification: =("医*" or "製薬")
● US applied patens or registered patents
(i) claims : ("compound" and "formul*") or "light‐emi* element" or "light‐emi* layer" or "EL layer" or "EL element*" or "EL material*“ or "electroluminescen*
layer" or "derivative" or "luminescen* layer*" or "organometal*" or "OLED*" or EL display
(ii) specification : ("OLED" or "organic compound*" or "organic material*" or "organic light emitting diode" or "organic light‐emitting diode" or "organic
electroluminescen*" or "organic light emitting element" or "organic light‐emitting element") and ("light emitting element" or "light‐emitting element"
or "electroluminescen*" or "light emitting material" or "light‐emitting material" or "light‐emitting layer" or "light emitting layer" ) or EL display
(iii) specification : "pharma*" or "medicine" or "medical"