Westinghouse applied for a patent for the new design in December 1886 ; it was granted in July 1887.
Westinghouse applied for a patent for the new design in December 1886 ; it was granted in July 1887.
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Westinghouse applied for a patent for the new design in December 1886 ; it was granted in July 1887.
Westinghouse applied for a patent for the new design in December 1886 ; it was granted in July 1887.
0.045 seconds.