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  • File:Patent-FR-947791.pdf
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    (1 295 × 1 752 (300 KB)) - 01:33, 12 dic 2021
  • File:Patent-GB-612956.pdf
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    (1 295 × 1 752 (408 KB)) - 22:54, 11 dic 2021
  • File:Patent-NL-43662.pdf
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    (1 239 × 1 754 (100 KB)) - 22:49, 11 dic 2021
  • File:Patent-US-2143601.pdf
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    (1 159 × 1 704 (64 KB)) - 02:00, 12 dic 2021
  • File:Patent-DE-326796.pdf
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    (1 296 × 1 754 (144 KB)) - 02:15, 11 dic 2021
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    (1 239 × 1 754 (184 KB)) - 02:26, 11 dic 2021
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  • File:Patent-GB-466012.pdf
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  • File:Patent-BE-426288.pdf
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    (1 239 × 1 754 (114 KB)) - 02:20, 11 dic 2021
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    (1 296 × 1 754 (110 KB)) - 01:33, 12 dic 2021
  • File:Patent-US-1336119.pdf
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  • File:Patent-CH-220232.pdf
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  • File:Patent-GB-179145.pdf
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    (1 245 × 1 755 (103 KB)) - 01:23, 12 dic 2021
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