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| Patents for Frederick H. W. Fraentzel | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 1,043,194 | Nov. 05, 1912 | J.C. Blevney | Grinding and polishing machine | |
 | 1,052,453 | Feb. 11, 1913 | J.C. Blevney | Grinding and polishing machine | |
 | 1,052,454 | Feb. 11, 1913 | J.C. Blevney | Caster | |
 | 1,052,455 | Feb. 11, 1913 | J.C. Blevney | Polishing-machine | |
 | 1,054,738 | Mar. 04, 1913 | C.E. Wright | Band-saw guide | |
 | 1,134,508 | Apr. 06, 1915 | J.C. Blevney | Grinding and polishing machine | |