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| Patents for Pneumatic & Electric Tool Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 464,820 | Dec. 08, 1891 | D. Drawbaugh | Pneumatic Tool for rock-cutting | ||
| 504,802 | Sep. 12, 1893 | D. Drawbaugh | Pneumatic tool | ||
| 504,803 | Sep. 12, 1893 | D. Drawbaugh | Pneumatic tool | ||
| 530,934 | Dec. 18, 1894 | D. Drawbaugh | Pneumatic tool | ||