The inventor, linguist, and author
Lin Yutang (1895–1976) filed a patent application with the
United States Patent and Trademark Office for an
electric typewriter for Chinese on 17 April 1946, which was granted on 14 October 1952. Lin called his typewriter design "MingKwai", derived from the characters and , meaning 'clear' and 'quick' respectively. Lin had a prototype machine custom built by the Carl E. Krum Company, a small engineering-design consulting firm with an office in New York City. That multilingual typewriter was the size of a conventional office typewriter of the 1940s. It measured . The typefaces fit on a drum. A "magic eye" was mounted in the center of the keyboard which magnifies and allows the typist to review a selected character. Characters are selected by pressing two keys to choose a desired character, which is arranged according to the system Lin devised for his Chinese-language dictionary, which
lexicographically orders characters using thirty geometric shapes or strokes as tokens, akin to letters in an alphabet. This system broke with the long-standing system of radicals and stroke order as a means of indexing characters. The selected Chinese character appeared in the magic eye for preview, the typist then pressed a "master" key, similar to today's computer
function key. The typewriter could create distinct characters using either one or two of six character-containing rollers, which in combination has full characters and 1,400 character radicals or partial characters. Lin's typewriter was not produced commercially. When Lin's daughter
Lin Tai-yi was to demonstrate use of the machine to executives of the
Remington Typewriter Company, they could not make it work. Though the machine was fixed for a press conference the next day, no further progress was made in attracting potential manufacturers. Lin had by then acquired considerable debt. The
Mergenthaler Linotype Company bought the rights for the typewriter, as well as the prototype, from Lin in 1948. The Cold War had begun and the United States and the Soviet Union were racing to research cryptography and machine translation. The United States Air Force acquired the keyboard to study machine translation and disk storage for rapid access to large quantities of information. The Air Force then handed the keyboard to Gilbert W. King, the director of research at IBM. King moved to
Itek and authored a seminal scientific paper on machine translation. He also unveiled the Sinowriter, a device for converting Chinese-character texts into machine input codes for processing Chinese into English. The sole known prototype was stored at Mergenthaler for over a decade until it was assumed lost when the company moved out of New York City. Tai-yi attempted to recover the prototype during a trip to the United States in the 1960s, but was only able to make contact with a Mergenthaler engineer three months after the move. Unknown to the wider world, Mergenthaler toolmaker Douglas Jung had kept the typewriter in his home basement, where it remained after his death in 2004. On 23 January 2025, the typewriter resurfaced in a social media post by Nelson Felix, husband of Jung's granddaughter Jennifer Felix, who found the prototype while he was cleaning out the basement and was unaware of its significance. Following the correspondence,
Stanford University Libraries announced on 2 May 2025 that it had acquired the prototype with the help of a private donor. == Cultural and technological impact ==