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| Patents for John L. Clark | |||||
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| Picture | Number | Date | Patentee | Title | |
| 554,378 | Feb. 11, 1896 | E.E. Rowland | Felted head wear | ||
| 567,381 | Sep. 08, 1896 | R. Eickemeyer | Magnetic separator | ||
| 567,382 | Sep. 08, 1896 | R. Eickemeyer | Magnetic separator | ||
| 664,733 | Dec. 25, 1900 | R. Eickemeyer | Method of converting the energy of alternating electric currents into effective mechanical energy | ||
| 700,310 | May 20, 1902 | R. Eickemeyer | Alternating-current electric motor and controlling means therefor | ||