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1952 Group Synchronising of Binary Digital Systems
1955 GB706687 (A) Electrical Signal Generating Systems IET
1948 A tracking Display and Data Transmission SRDE Tech Memo RES 113
1948 Improvements in or relating to Apparatus for data in Binary Digital Form <ref>{{cite web |last1=Barker |first1=RH |title=Improvements in or relating to apparatus for the representation of data in a binary digital form |url=https://worldwide.espacenet.com/patent/search/family/010175782/publication/GB650913A?q=pn%3DGB650913A |publisher=European Patents Office |access-date=January 24, 2024 |ref=GB650913A |date=1951}}</ref>
1949 Appendix II to Conversion of Shaft Position to Binary Pulse Code.pdf IETR Ref
1953 GB891810 Electrical Pulse Code Modulation
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