pdf Patents Assigned To or Used By SELECT-O-PHONE

Published on 27 September 2024 Modified on 27 September 2024 82 downloads

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90 pages. Use bookmarks. SOP. Contributed by Mike Neale.

816948 APR 3 1906 - Controller
816948 APR 3 1906 - Autophone System
1265398 MAY 5 1918 - Automatic Telephone Central Station
1280096 SEP 24 1918 - Automatic Telephone System
1280097 SEP 24 1918 - Automatic Telephone Substation
1470202 OCT 9 1923 - Selector Rack for Automatic Telephone Systems
1538141 MAY 19 1925 - Telephone System
2213933 SEP 3 1940 - Telephone System
2248899 JUL 8 1941 - Telephone System

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