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| Patents for Frederick S. Haas | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,850,392 | Mar. 22, 1932 | F.S. Haas | Machine tool | surface grinders | |
| 1,862,851 | Jun. 14, 1932 | F.S. Haas | Grinding Machinery | grinding machines | |
| 1,877,505 | Sep. 13, 1932 | B.A. Kearns, F.S. Haas | Grinding Machine | grinding machines | |
| 1,891,662 | Dec. 20, 1932 | F.S. Haas, C. Booth | Machine Tool | grinding machines | |
| 1,905,224 | Apr. 25, 1933 | C. Booth, F.S. Haas | Grinding Machinery | grinding machines | |
| 1,938,757 | Dec. 12, 1933 | F.S. Haas, S. Einstein | Grinding Machine | grinding machines | |
| 1,938,762 | Dec. 12, 1933 | F.S. Haas | Grinding Machine | cylindrical grinders | |
| 1,938,763 | Dec. 12, 1933 | F.S. Haas | Grinding Machinery | grinding machines | |
| 1,938,764 | Dec. 12, 1933 | H. Fritschi, F.S. Haas | Grinding Machine | grinding machines | |
| 1,938,765 | Dec. 12, 1933 | F.S. Haas | Grinding Machine | grinding machines | |
| 1,952,130 | Mar. 27, 1934 | F.S. Haas, R.E. Harrison | Brake Shoe Grinder | grinding machines | |
| 1,952,432 | Mar. 27, 1934 | F.S. Haas | Grinding Machine | grinding machines | |
| 1,965,234 | Jul. 03, 1934 | F.S. Haas | Grinding Machine | grinding machines | |
| 1,965,235 | Jul. 03, 1934 | F.S. Haas | Grinding Machine | grinding machines | |
| 1,972,826 | Sep. 04, 1934 | F.S. Haas | Grinding Machine | grinding machines | |