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Chart showing last GB patent issued in each year from 1920 to 1959

This document was inspired by a list published at http://www.tri.net/radio/patent.html showing the last US patent number granted in each year, as a tool for use in establishing the earliest possible date of manufacture for any given radio set (displaying patent numbers). This is my UK / GB equivalent of the list presented on that site.

I have attempted to test the validity of the technique for establishing dates for UK radio sets by cross-referencing various UK radio sets against issue dates for their assosciated patents. This may be seen here. You can even read the original patents if you are interested!

Issue DatePatent
31/12/1920GB156286
30/12/1921GB173835
29/12/1922GB191124
31/12/1923GB209150
31/12/1924GB226854
31/12/1925GB229683
31/12/1926GB243675
30/12/1927GB283254
31/12/1928GB303540
31/12/1929GB323501
Issue DatePatent
31/12/1930GB340526
31/12/1931GB363858
30/12/1932GB386005
29/12/1933GB404308
31/12/1934GB422341
31/12/1935GB440719
31/12/1936GB459047
31/12/1937GB477578
30/12/1938GB498287
29/12/1939GB516337
Issue DatePatent
31/12/1940GB531238
31/12/1941GB542235
31/12/1942GB550248
31/12/1943GB558349
29/12/1944GB566450
31/12/1945GB574316
31/12/1946GB583834
31/12/1947GB596285
31/12/1948GB615062
30/12/1949GB633875
Issue DatePatent
28/12/1950GB648180
27/12/1951GB663940
31/12/1952GB685360
30/12/1953GB701780
29/12/1954GB721190
30/12/1955GB742700
28/12/1956GB764680
23/12/1957GB788350
31/12/1958GB806870
31/12/1959GB826320