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| Patents for A. F. Macdonald | |||||
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| Number | Title | Classification(s) | |||
| 524,396 | Controller for Electric Motors | 200/10, 200/7, 200/9, 361/135, 361/14 | |||
| 583,935 | Series Parallel Controller | 200/10, 200/5R, 200/7, 318/95 | |||
| 596,186 | Phase Regulator | 318/829, 323/201 | |||
| 620,965 | Alternating Current Motor | 310/172, 318/797 | |||
| 620,966 | Induction Motor | 318/816 | |||