Ul·​tra·​fax | \ ˈəltrəˌfaks\

Definition of Ultrafax

: a very high-speed facsimile transmission that uses television techniques for scanning, transmission, and reproduction formerly a U.S. registered trademark

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First Known Use of Ultrafax

1947, in the meaning defined above

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The first known use of Ultrafax was in 1947

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involving a confidence or trust

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