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George Hutton Armstrong
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Individual
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Individual
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Publication of GB190215407ApublicationCriticalpatent/GB190215407A/en
15,407. Armstrong, G. H. July 10. Hair-pins.- The two prongs D, E of a hair-pin touch and cross one another. After partially inserting the pin in the hair, the prongs are uncrossed by turning the upper part of the pin relatively to the lower part and the pin is then completely inserted, after which the prongs are crossed by releasing the upper part.