On May 22, 1886
But read on...
His October 21, 1885 affidavit directly contradicts this story and Wilber claims it was ''given at the request of the Bell company by Mr. Swan, of its counsel'' and he was ''duped to sign it'' while drunk and depressed. However, Wilber's April 8, 1886, affidavit was also sworn to and signed before Thomas W. Swan. These conflicting affidavits discredited Wilber.
There were 600 lawsuits over Bell's patent, none successful, and a bad smell about the business from the start.
Others also laid claim to inventing versions of the telephone, including a Mr. Rogers, manager of the Pan-Electric Telephone Company. Rogers distributed his company's stock to members of Congress, including Senator Garland, (soon to become Attorney General) in the unstated hope of favorable treatment. If the Bell patent were to be invalidated, the Rogers patent and the Pan-Electric stock could become very valuable.