The Twelve Patents of Christmas

And now, brought to you by Google Patents… I present a new twist … (music, please) On the twelfth day of Christmas, my true love sent to me…… Twelve drummers drumming, (US Patent 361606)Eleven pipers piping, (US Patent 3151517)Ten lords a-leaping, ( US Patent 1513338 ) …(helmet recommended)Nine ladies dancing, (US patent 1374840) …(can you…