9th February 1932, Page 60
9th February 1932
Page 60
Page 60, 9th February 1932
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An Infinitely Variable Gear
A IVsur'a of Recently Published Patent Specifications A N interesting invention is described in patent No. 11363,985, by S. M. L. Hall, 34b, CIanricarde Gardens, London, W,2,......