秋山さん特許明細書 https://www.inhouse-patent-attorney.com/patent-description/%e7%a7%8b%e5%b1%b1%e3%81%95%e3%82%93%e7%89%b9%e8%a8%b1%e6%98%8e%e7%b4%b0%e6%9b%b8/