Classement par Inventeurs / Calculateurs
John William Hasselkus
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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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| _/_ | GB 0 188 621 |
5,5
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280
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30
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1922
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2/3
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 |
J. Hasselkus
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Ross
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| _/_ | US 1 777 262 |
4
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100
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70
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1930
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21/12
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 |
John William Hasselkus, George A. Richmond
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_/_
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| _/_ | US 2 116 264 |
5,6
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100
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100
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1938
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11/111
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 |
John William Hasselkus
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_/_
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| _/_ | GB 0 507 590 |
2
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100
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60
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1939
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12/21
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W. Hasselkus, G. Richmond
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_/_
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