US v. Adams (JWB Class)

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The Case

  • Adams was issued a patent for a wet battery powered by water
    • wet – electrolytes (between anode and cathode) are in a liquid
    • provides battery function without using acid, dangerous fumes
  • Additionally, the battery provided relatively constant current

The Prior Art

  • Magnesium had been used instead of zinc, but no prior art suggested water could be used
  • Non-obvious because the battery performance unexpectedly surpassed existing wet batteries