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| Patents for Philip Hufeland | |||||
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| Number | Date | Patentee | Title | Type | |
| 103,241 | May 17, 1870 | P. Schrag, P. Hufeland | Improvement in machines for cutting off lead-pencils | pencil making machines | |
| 103,746 | May 31, 1870 | P. Hufeland | Improvement in machine for grooving lead-pencil blanks | pencil making machines | |
| RE5,236 | Jan. 14, 1873 | P. Schrag, P. Hufeland | Machine for cutting off pencils | pencil making machines | |
| 164,838 | Jun. 22, 1875 | P. Hufeland | Improvement in machines for cutting fan-leaves | specialty woodworking machines | |