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Home Q & A Board Humanities Language Studies
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Jovaini Jovaini
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6 years ago
The U.S. Patent Office opened in 1838 it has granted more patents for mouse traps
  than for any other invention.
 
  A) 1838, it B) 1838; it C) no change
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mwarner93mwarner93
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6 years ago
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5 years ago
Thank you
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