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Although, Maxim applied for a patent on the electric light bulb before Edison did, he ran into a .

Question 1:

Although, Maxim applied for a patent on the electric light bulb before Edison did, he ran into a ....... of*^*obstructions.

A. quagmire

B. quaver

C. quarto

D. quash

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Inventor of the Light Bulb | C1 – Advanced

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