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| Patents for Otto F. Barthel | |||||
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| Number | Title | Classification(s) | |||
| 517,066 | Calipers | 33/199R, 33/796 | |||
| 578,508 | Potato-planter | 111/92 | |||
| 659,290 | Glass-blowing machine | 65/301 | |||
| 687,209 | Miter-cutting machine | 83/465, 83/760 | |||
| 702,360 | Automatic-cut-off sawing-machine | 83/389 | |||
| 715,352 | Cutter Adjuster | 30/486, 30/489 | |||
| 852,846 | Device For Facilitating The Removal Of Valves | 29/219, 81/484 | |||
| 868,803 | Beading or Molding Tool | 30/281 | |||
| 1,127,754 | Nut-machine | 29/51, 470/198, 470/87 | |||