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| Patents for Frederick S. Haas | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,360,671 | Oct. 17, 1944 | A.C. Janke, C.O. Graves, F.S. Haas | Surface Grinder | grinding machines | |
| 2,478,562 | Aug. 09, 1949 | F.S. Haas, G.W. Binns | Grinding Machine | cylindrical grinders | |
| 2,622,375 | Dec. 23, 1952 | W. Trible, F.S. Haas | Grinding Machine | surface grinders | |
| 2,641,873 | Jun. 16, 1953 | F.S. Haas | Automatic Truing Mechanism | grinder dressers | |
| 2,665,681 | Jan. 12, 1954 | F.S. Haas | Truing Mechanism | grinder dressers | |