Fil:Raytheon CK722 April 1955.jpg

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Beskrivelse
English: Raytheon introduced the CK722 in early 1953 at $7.60 each; the price was reduced to $3.50 in late 1954. The CK722 was actually a selected "fall out" from the firm's premium-priced hearing-aid transistor line. This germanium PNP junction transistor was very popular with hobbyist and was featured in many construction articles in magazines and books. This advertisement appeared on page 8 of the April 1955 issue of the Popular Electronics.
Dato
Kilde Scanned and cropped from page 8 of the April 1954 Popular Electronics magazine by Michael Holley Swtpc6800
Forfatter Raytheon Mfg. Co.
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This advertisement did not have a copyright notice and is in the public domain.

From the US Copyright Office Circular 3. Page 3, Contributions to Collective Works. (A magazine is a "collective work.")

A notice for the collective work will not serve as the notice for advertisements inserted on behalf of persons other than the copyright owner of the collective work. These advertisements should each bear a separate notice in the name of the copyright owner of the advertisement.

Andre versioner File:CK722.JPG

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This work is in the public domain in the United States because it was published in the United States between 1929 and 1977, inclusive, without a copyright notice. For further explanation, see Commons:Hirtle chart as well as a detailed definition of "publication" for public art. 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 (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties.

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Dato/tidMiniaturebilledeDimensionerBrugerKommentar
nuværende23. apr. 2011, 20:53Miniature af versionen fra 23. apr. 2011, 20:53600 × 1.700 (167 KB)Swtpc6800== {{int:filedesc}} == {{Information |Description={{en|1= Raytheon introduced the CK722 in early 1953 at $7.60 each; the price was reduced to $3.50 in late 1954. The CK722 was actually a selected "fall out" from the firm's premium-priced hearing-aid trans

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