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| Patents for Hammond Type Writer Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 577,104 | Feb. 16, 1897 | J.H. Dorman | Card or envelop holder for type-writers | office worker | |
| 763,165 | Jun. 21, 1904 | J.H. Dorman | Paper-carriage for type-writing machines | office worker | |