Sketch of an 'Improved Mechanical Motion Device' (wool shearing handpiece) invented by David Unaipon, 3 September 1909
Courtesy of/Photographer:
Department of Patents, Commonwealth of Australia
Citation:
Image courtesy of the Flinders University Department of Computer Science, Engineering and Mathematics, http://csem.flinders.edu.au/thegoodstuff/IndigiSTEM/docs/engineering/Patent15624-09.pdf
