Anonymous ID: 84ae9c Dec. 21, 2018, 10:18 p.m. No.4421072   🗄️.is 🔗kun   >>1091

>>4421032

Look up US Patent: 5003186

 

http://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=5003186.PN.&OS=PN/5003186&RS=PN/5003186