441![](https://www.pdfsearch.io/img/8246f917511aff068ba3f12ad6c37f32.jpg) | Add to Reading ListSource URL: invention.smithsonian.orgLanguage: English - Date: 2006-01-12 14:09:59
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442![](https://www.pdfsearch.io/img/b4b1b73d56734cfaded319f3deeeb6bf.jpg) | Add to Reading ListSource URL: cm.bell-labs.comLanguage: English - Date: 1998-07-16 11:23:47
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443![](https://www.pdfsearch.io/img/811d46c90f7056eeb9d7d7df191346a4.jpg) | Add to Reading ListSource URL: cm.bell-labs.comLanguage: English - Date: 1998-12-11 02:04:19
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444![](https://www.pdfsearch.io/img/c8397b6804a71284f3b588582a5c7d8f.jpg) | Add to Reading ListSource URL: cm.bell-labs.comLanguage: English - Date: 1998-12-11 02:05:30
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445![](https://www.pdfsearch.io/img/7af9335376e1f5d0fd27edc49ca7f263.jpg) | Add to Reading ListSource URL: ect.bell-labs.comLanguage: Norwegian - Date: 2008-10-10 13:42:06
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446![](https://www.pdfsearch.io/img/7466454b6921e4236500b1798d8dcbba.jpg) | Add to Reading ListSource URL: ect.bell-labs.comLanguage: Somali - Date: 2008-10-10 13:42:05
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447![](https://www.pdfsearch.io/img/a5b511a489a69a49b9441d6c882990b7.jpg) | Add to Reading ListSource URL: ect.bell-labs.comLanguage: Swedish - Date: 2008-10-10 13:42:05
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448![](https://www.pdfsearch.io/img/96593a5b66e6a16aaa785b4f7e118584.jpg) | Add to Reading ListSource URL: cm.bell-labs.comLanguage: Polish - Date: 2008-08-08 09:32:02
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449![](https://www.pdfsearch.io/img/47642771aebe2a9a1b84b0a284fea669.jpg) | Add to Reading ListSource URL: cm.bell-labs.comLanguage: English - Date: 1997-07-06 21:28:40
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450![](https://www.pdfsearch.io/img/f6027d28aa882cfaf3959d05036103ea.jpg) | Add to Reading ListSource URL: cm.bell-labs.com- Date: 1999-01-11 16:26:11
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