Classement par Marques / Fabricants
Beck
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Nom
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Source
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f/
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Fmm
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a°
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Date
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Type
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Coupe
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Inventeur
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Maison
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Lien
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| _/_ | tur nº119 a p158 GB 1906 27 180 |
8
|
100
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30
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1906
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11/111
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 |
H. C. Beck
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Beck
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| _/_ | US 871 559 |
8
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100
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30
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1907
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11/111
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 |
H. C. Beck
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Beck
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| <Projection and photography lens> | US 1 034 408 |
4,5
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100
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35
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1911
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/111
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 |
Conrad et Horace Beck
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Beck
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| Triplet | GB 1911 03 399 | Tur. nš156b p.199 |
6,0
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93,3
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40
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1911
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1/11
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 |
C. Beck
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_/_
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| Triplet | GB 1911 04 714 | Tur. nš156c p.199 |
6,0
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93,3
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50
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1911
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1/11
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 |
C. Beck
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_/_
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