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...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 6899863 | Method for preparing membrane vesicles This invention relates to a method of preparing membrane vesicles from a biological sample, characterised in that it comprises at least one anion exchange and/or gel permeation chromatography treatment of the sample. The invention is used to prepare vesicles of vari... | 05/31/2005 |
