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US patent laws were "first to invent" from the first patents through September 16, 2011. The America Invents Act changes the US system to "first to file."

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US patent laws were "first to invent" from the first patents through September 16, 2011. The America Invents Act changes the US system to "first to file."

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The first person to invent the first mobile cellular telephone was Martin Cooper.

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Yes, they were the first to invent chewing gum.

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