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Alexander Graham Bell found guilty of plagiarism after 130 years PDF Print E-mail
Written by Stuart Corner   
Monday, 07 January 2008
Page 1 of 3
A new book on the history of the telephone is being lauded for revealing the "shocking truth" that Alexander Graham Bell plagiarised a key component of his invention from rival Elisha Gray. The book's author may have uncovered the vital damning evidence that eluded Bell's accusers over a hundred years ago, but there is little shocking in the allegations which were thoroughly aired and repeatedly tested in court several times in the late 19th century.
The controversy started on 14 February 1876 when Bell's friend Gardiner Hubbard filed - at the US patent office in Washington DC - US patent number 174,465 titled "Improvements To Telegraphy" (no mention of telephony!). A few hours later that same day a rival inventor, Elisha Gray filed in the same patent office a 'caveat' or warning to other inventors for a speaking telephone.

A crucial component of the patent application was a means of converting sound waves to electricity by causing the sound pressure to vary the resistance of an electrical conductor (a method still used today in carbon microphones).

Details of this were written into the margin of the application almost as an afterthought. Accusations flew thick and fast that Bell had been, illegally, given access to Gray's caveat, which included details of the technique and had amended his patent after submission.

According to the AT&T sponsored history. "Telephony The First Hundred Years" written by John Brooks and published in 1975, the patent "became the subject of thousands of pages of testimony in hundreds of suits to annul it, all unsuccessful...and it would be called, with few challengers, the most valuable patent ever issued."

A decade after the initial round of legal challenges to the patent had all failed Zenas F Wilbur, the patent examiner who had handled both Bell's and Gray's filings testified to a Congressional Enquiry that he had illegally notified Bell's attorneys when he had discovered a conflict between the two filings.
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