File:The Isolator (cropped).jpg

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Description Page from Science and Invention
Date
Source [1]
Author Experimenter Publishing
Permission
(Reusing this file)		 Science and Invention ceased publication with the August 1931 issue. A search of the copyright renewal records from 1951 to 1959 shows no entries for Science and Invention. All issues are in the public domain.
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 The Isolator (colorized).jpg

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Public domain
This work is in the public domain because it was published in the United States between 1929 and 1963, and although there may or may not have been a copyright notice, the copyright was not renewed. For further explanation, see Commons:Hirtle chart and the copyright renewal logs.
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.

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Date/TimeThumbnailDimensionsUserComment
current21:23, 23 April 2022Thumbnail for version as of 21:23, 23 April 20221,447 × 926 (871 KB)Racconish (talk | contribs)
12:45, 13 April 2022Thumbnail for version as of 12:45, 13 April 20221,447 × 926 (891 KB)Racconish (talk | contribs)
12:07, 20 August 2021Thumbnail for version as of 12:07, 20 August 20211,447 × 926 (795 KB)Racconish (talk | contribs)
08:30, 20 August 2021Thumbnail for version as of 08:30, 20 August 20211,447 × 926 (763 KB)Racconish (talk | contribs)
22:31, 4 January 2021Thumbnail for version as of 22:31, 4 January 20211,421 × 903 (716 KB)Racconish (talk | contribs)= {{int:filedesc}} == {{Information |Description=Page from ''Science and Invention'' |Source=[https://worldradiohistory.com/Archive-Electrical-Experimenter/SI-1925-07.pdf] |Date=1925-07 |Author=Experimenter Publishing |Permission=''Science and Invention'' ceased publication with the August 1931 issue. A search of the copyright renewal records from 1951 to 1959 shows no entries for ''Science and Invention''. All issues are in the public domain. |other_versions={{Extracted from|1=The Isolator....

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