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| Patents for Frederick Holz | |||||
| Picture | Number | Date | Patentee | Title | |
![]() | 432,621 | Jul. 22, 1890 | F. Holz | Milling Machine | |
![]() | 439,154 | Oct. 28, 1890 | F. Holz | Cutter Grinder | |
![]() | 513,683 | Jan. 30, 1894 | F. Holz | Milling Machine | |
| 554,422 | Feb. 11, 1896 | F. Holz | Milling Machine | ||
![]() | 554,423 | Feb. 11, 1896 | F. Holz | Milling Machine | |
![]() | 658,777 | Oct. 02, 1900 | F. Holz | Milling Machine | |
| 774,843 | Nov. 15, 1904 | F. Holz | Feed Gearing for Machine Tools | ||