您即将离开哈喽比特，请留意您所访问的内容是否安全。
https://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=10890494.PN.&OS=PN/10890494&RS=PN/10890494
