From the 1890s to the 1950s, the method of switch selection introduced by Almon Brown Strowger (1839-1902) dominated automatic telephony. This part is...
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Image Number: 1895-4211Rights ManagedCredit Line:SM/SSPL/Science and Society/SuperStockCollection:Science and Society Contributor:SM/SSPL Model Release:NoProperty Release:NoResolution:3504×2900