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 |
| 4629090 | Hotel room bar with optical sensing system A bar has at least one compartment, a plurality of removeable magazines mounted in the compartment, fiber optics associated with the bar compartment and each magazine for assisting to detect the removal of a magazine from the bar compartment and the remov... | 12/16/1986 |
