File:AT&T Thompson US1508424 1924-09-16 Fig1 Telephone Desk Set.png

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Summary

Excerpt from US Patent 1508424 1924-09-16, Illustration, Fig. 1, Author Thompson, G.K. (AT&T)

Image is in the public domain in the U.S. as it was published before 1927.

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current12:51, 27 November 2022Thumbnail for version as of 12:51, 27 November 2022900 × 1,300 (156 KB)imagesenwiki>KbroseCorrect aspect ratio of image.

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