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| Patents for American Pneumatic Service Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,048,931 | Dec. 31, 1912 | T. Bemis | Pneumatic-despatch apparatus | ||
| 1,079,311 | Nov. 18, 1913 | T. Bemis | Pneumatic-despatch apparatus | ||