Did You Know...
...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 |
| 5911172 | Retractable underwater turret The present invention, as disclosed and taught herein, comprises apparatus nd method for an underwater turret system suitable for use on surface or underwater vessels. The turret system is housed in an underwater bay from which the turret may be deployed a... | 06/08/1999 |
