the gatling system was first patented in
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the gatling system was first patented in, when was the first gatling gun invented, what did richard gatling invent, when was the gatling gun first used, what year was the gatling gun invented, invention of the gatling gun, history of the gatling gun, who invented the gatling gun, gatling gun invention date, who invented the gatling gun 1884, gatling gun invented date, inventor of the gatling gun, gatling gun invention 1861, gatling gun history and facts, when were gatling guns made