1925 - Dr. W. Blair Bell gave a lecture in London, advocating treatment of cancer with colloidal lead injections. The May 1926 issue of Popular Science Monthly said he injected the metal into veins near the cancerous growth and claimed that in seventeen years of testing, out of about 200 cases treated, most of them thought hopeless, almost fifty were entirely and permanently cured.
1970, a U.S. patent was issued for the computer mouse - an "X-Y Position Indicator for a Display System" (No. 3541541).
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