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 |
| 5424118 | Interlocking insulative panel construction Refrigeration units such as walk-in coolers and freezers, particularly interlocking insulative panels used in construction of such units. The individual insulative panels are characterized by a densified urethane perimeter and a core of low density insula... | 06/13/1995 |
| 5060429 | Ceiling-wall attachment A supporting assembly for abutting insulating ceiling or wall panels which are camlocked together, comprising a structural support, a flanged spacer member secured between the structural support and the panels, and a thread rod extending longitudinally th... | 10/29/1991 |
