Category:Alexander Graham Bell patents

Subcategories

This category has the following 2 subcategories, out of 2 total.

Media in category "Alexander Graham Bell patents"

The following 7 files are in this category, out of 7 total.

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  Alexander Graham Bell's Telephone Patent Drawing and Oath - NARA - 302052 (page 1).gif 603 × 922; 159 KB
  
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  Alexander Graham Bell's Telephone Patent Drawing and Oath - NARA - 302052 (page 2).jpg 864 × 1,200; 150 KB
  
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  Bell's drawing for Patent 161739 granted by U.S. PTO in April 1875.jpg 1,467 × 469; 49 KB
  
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  Detail showing liquid transmitter in Bell's U.S. Patent No. 161739 obtained in April, 1875.jpg 458 × 365; 15 KB
  
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  Patent Drawing of Telegraphy by Alexander Graham Bell - NARA - 6120306 (page 1).jpg 2,190 × 3,150; 925 KB
  
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  Patent Drawing of Telegraphy by Alexander Graham Bell - NARA - 6120306 (page 2).jpg 2,129 × 3,150; 655 KB
  
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  USPTO Telephone Patent No. 174465.jpg 415 × 622; 241 KB