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File:Patent-US-2868173.pdf (1 159 × 1 704 (329 KB)) - 02:14, 12 dic 2021File:1959-11-Parker-61-EtAl.jpg (3 056 × 4 144 (1,53 MB)) - 19:23, 14 mag 2024File:Patent-GB-809236.pdf (1 295 × 1 752 (165 KB)) - 22:50, 11 dic 2021File:Patent-US-2916013.pdf (1 159 × 1 704 (408 KB)) - 02:16, 12 dic 2021File:Patent-CH-341736.pdf (1 296 × 1 754 (414 KB)) - 16:17, 1 nov 2022File:Patent-US-2881737.pdf (1 159 × 1 704 (229 KB)) - 02:14, 12 dic 2021File:Patent-FR-1171431.pdf (1 295 × 1 752 (476 KB)) - 02:28, 11 dic 2021File:Patent-US-2956548.pdf (1 159 × 1 704 (158 KB)) - 02:10, 12 dic 2021- 619 byte (87 parole) - 02:35, 25 nov 2020
File:Patent-US-2905148.pdf (1 159 × 1 704 (537 KB)) - 02:10, 12 dic 2021- 673 byte (94 parole) - 01:27, 16 gen 2015
File:Patent-US-2871825.pdf (1 159 × 1 704 (245 KB)) - 02:15, 12 dic 2021File:Patent-DE-1234578.pdf (1 295 × 1 752 (321 KB)) - 02:17, 11 dic 2021File:1959-10-Sheaffer-Snorkel-Pens-EtAl.jpg (5 099 × 7 013 (5,23 MB)) - 14:20, 3 lug 2022File:Patent-FR-1197651.pdf (1 295 × 1 752 (603 KB)) - 02:28, 11 dic 2021File:Patent-US-2902978.pdf (1 159 × 1 704 (206 KB)) - 02:10, 12 dic 2021- 6 KB (906 parole) - 22:41, 17 lug 2022
- 6 KB (947 parole) - 18:51, 17 giu 2017
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- 3 KB (473 parole) - 14:05, 17 ago 2022
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