 
 <prompt> How Bell fit confirm im claim for the patent without the one cup of mercury statement? Given the previous question, write a context wey contain the answer. E fit be 1 - 20 sentences. Context: <response>: ```Di question of priority for di variable resistance feature of di telephone bin dey raised by di examiner before e approve Bell's patent application. E tell Bell say im claim for di variable resistance feature dey also described for Gray's caveat. Bell point to a variable resistance device for Bell's previous application wey Bell describe as cup of mercury, no be water. Bell don file di mercury application for di patent office one year earlier on February 25, 1875, long before Elisha Gray describe di water device. For top, Gray abandon im caveat, and because e no contest Bell's priority, di examiner approve Bell's patent on March 3, 1876. Gray don reinvent di variable resistance telephone, but Bell na di first wey write down di idea and di first wey test am for telephone.``` 