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| Patents for Frederick H. Ayer | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 1,072,807 | Sep. 09, 1913 | F.H. Ayer | Ratchet Driving Mechanism | |
 | 1,199,737 | Sep. 26, 1916 | F.H. Ayer | Ratchet Mechanism | |
 | 1,199,738 | Sep. 26, 1916 | F.H. Ayer | Reversible Clutch Mechanism | |