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| Patents for United States Envelope Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 889,269 | Jun. 02, 1908 | E.B. Stimpson | Envelop-fastener | ||
| 924,778 | Jun. 15, 1909 | G.H. Haslop | Adjusting Device for Cutting Dies | paper cutting machines | |