Henry Quackenbush
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Henry Quackenbush (1847–1933) was an American industrialist. He founded the H. M. Quackenbush Company, a metal finishing company now called Whyco Finishing Technologies. He invented the extension ladder and helped standardize shot size in guns.
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If you come across a metal nutcracker marked with HMQ or QBC it was made by Quackenbush's company.
