A search for renewal was done in periodicals for the years 1974 and 1975. There were no listings for the title Radio Mirror; there's no evidence of continuing copyright for the magazine.
Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (70 years p.m.a.), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties.
{{Information |Description=Photo of radio broadcaster Ted Malone. |Source=[https://archive.org/stream/radiom00mac#page/n47/mode/2up page 35] Radio Mirror (upper right) |Date=[https://archive.org/stream/radiom00mac#page/n9/mode/2up January 1947] |Author...
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