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| Patents for William F. Costello | |||||
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| Number | Date | Patentee | Title | Type | |
| 898,972 | Sep. 15, 1908 | H.O. Costello | Quick-adjusting Micrometer | micrometers | |
| 1,826,739 | Oct. 13, 1931 | W.F. Costello | Tool Set and Container Therefor | wrench set holders | |
| 1,900,915 | Mar. 14, 1933 | W.F. Costello | Wrench Set | wrench set holders | |
| 2,030,138 | Feb. 11, 1936 | W.F. Costello | Tool Set and Container Therefor | wrench set holders | |
| 2,206,943 | Jul. 09, 1940 | W.F. Costello | Ratchet Device | ratchet wrenches | |