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- Hacking & Schleicher Inc.
Country City Providence RI
Shape octagon
Symbol octagon
Era c.1950
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- Hayward Co., Walter E.
Country City Attleboro MA
Era c.1922, c.1934 c.1950, c.1943
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- Hesselpoth & Smethurst
Country City Philadelphia PA
Era c.1896, c.1915, c.1922
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- Howard & Smith
Country City Ottawa
Era c.1922