File:Klipschorn speaker drawing 1948 (cropped).png

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Klipschorn_speaker_drawing_1948_(cropped).png (187 × 290 pixels, file size: 11 KB, MIME type: image/png)

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Description
English: Drawing of the Klipschorn loudspeaker manufactured by Klipsch Audio Technologies from 1948. The Klipshorn is a high fidelity speaker system whose notable feature was its folded bass horn system, which is open at the back and is designed to use the walls and floor in the corner of a room as part of the horn structure, to achieve better bass response. The speaker is designed to be placed in the corner of the room.
Date
Source Retrieved March 30, 2015 from "New Trends in Loud Speakers" in Radio-Electronics magazine, October 1948, p. 31 on http://www.americanradiohistory.com
Author Unknown authorUnknown author
Permission
(Reusing this file)		 This 1948 issue of Radio-Electronics magazine would have the copyright renewed in 1976. Online page scans of the Catalog of Copyright Entries, published by the US Copyright Office can be found here. Search of the Renewals for Periodicals for 1975, 1976, and 1977 show no renewal entries for Radio-Electronics. Therefore the copyright was not renewed and it is in the public domain.
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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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current17:10, 22 June 2022Thumbnail for version as of 17:10, 22 June 2022187 × 290 (11 KB)Pittigrilli (talk | contribs)File:Klipschorn speaker drawing 1948.png cropped 73 % horizontally, 8 % vertically using CropTool with precise mode.

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