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Johan Petter Johansson

Last mentioned in Stockholm : Sweden
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Johan Petter Johansson's Biography

Johan Petter Johansson (December 12, 1853–August 25, 1943), sometimes known as JP, was a Swedish inventor and industrialist. He invented a modern adjustable spanner (patents in 1891 and 11 May 1892). He obtained over 100 patents in total.

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