They Invented What? (No. 221)
U.S. Patent No. 110,760: Precautionary attachment for bottles containing poison.
JW Note: An old patent (circa 1871), but located just in time for the Halloween season! Hat tip to the United States Patent and Trademark Office Facebook page for bringing this one to our attention. LIKE!
A band for poison-bottles, etc., consisting of an elastic ring with projecting spikes, as described.