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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 |
| 5464180 | Support set of golf club bag A golf club bag support set comprises a fixation member, two rod members, a sliding member, two first elastic members, two second elastic members, an urging member, and a bottom plate. The sliding member is forced to move upwards when the urging member is... | 11/07/1995 |
