Solymon Merrick patented the wrench tool.
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William B. Purvis patented the electric switch on railways that would shut off the electric supply after carriages pass the contact device.
Daniel Halladay patented the self-governing windmill.
Alexander Graham Bell applied for a patent for the telephone.
Mary Kies became the first woman ever to acquire a patent.
Daniel McCree patented the portable fire escape in the US.
