| Patents for Frank W. Curtis |
Patents 1 -
15
of 21
      |
| Number | Date | Patentee | Title | Type |
| 1,865,617 | Jul. 05, 1932 | F.W. Curtis | Metal Cutting Tool | milling machine cutters |
| 1,917,504 | Jul. 11, 1933 | F.W. Curtis | Cutter Grinder | sharpening machines |
| 2,118,967 | May 31, 1938 | F.W. Curtis | Cutter grinder | tool grinders |
| 2,141,263 | Dec. 27, 1938 | F.W. Curtis | Indexing Work Holder | indexers and dividers |
| 2,230,716 | Feb. 04, 1941 | F.W. Curtis | Table Drive for Milling Machines | milling machines |
| 2,281,921 | May 05, 1942 | F.W. Curtis | Tumble Change Gear Mechanism | milling machines |
| 2,289,874 | Jul. 14, 1942 | F.W. Curtis | Milling Machine | milling machines |
| 2,301,525 | Nov. 10, 1942 | F.W. Curtis | Milling Machine | milling machines |
| 2,302,744 | Nov. 24, 1942 | F.W. Curtis | Spindle Control for Machine Tools | milling machines |
| 2,304,779 | Dec. 15, 1942 | F.W. Curtis | Toolhead Unit | milling machines |
| 2,308,647 | Jan. 19, 1943 | F.W. Curtis | Hydraulic Machine Tool | milling machines |
| 2,309,241 | Jan. 26, 1943 | F.W. Curtis | Dividing Head | indexers and dividers |
| 2,325,746 | Aug. 03, 1943 | F.W. Curtis | Metal Cutting Tool with Inserted Teeth | milling machine cutters |
| 2,327,404 | Aug. 24, 1943 | F.W. Curtis | Milling Machine | milling machines |
| 2,328,061 | Aug. 31, 1943 | F.W. Curtis | Hydraulic Vise | milling machine accessories |
