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| All Patents of Type: door springs | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,574X | Apr. 23, 1816 | S. Trumbull | Spring Bolt for Windows, Doors, Etc. | door springs | |
| NX-183,002,201 | Feb. 20, 1830 | I. Eaton | Door Spring | door springs | |