File:US02632058 Gray.png
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Original file (1,600 × 1,114 pixels, file size: 159 KB, MIME type: image/png)
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 16:24, 27 August 2008 | No thumbnail | 1,600 × 1,114 (159 KB) | commonswiki>File Upload Bot (Magnus Manske) | {{BotMoveToCommons|en.wikipedia}} {{Information |Description={{en|Top of front page of Frank Gray's US patent 2632058, showing PCM tube 10 with plate 15 in reflected binary code pattern.}} |Source=Transferred from [http://en.wikipedia.org en.wikipedia]; |
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