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| Patents for Wm. B. Fell Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,940,784 | Jun. 14, 1960 | W.B. Fell | Precision threaded adjustment | machinist levels | |
| 3,034,220 | May 15, 1962 | W.B. Fell | Micro-precision level | machinist levels | |
| 3,226,832 | Jan. 04, 1966 | W.B. Fell | Linearity testing gauge | measuring tools | |
| CA-761,164 | Jun. 20, 1967 | W.B. Fell | Linearity testing gauge | measuring tools | |
| 3,605,508 | Sep. 20, 1971 | W.B. Fell | Precision threaded adjustment | machinist levels | |