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| Patents for William Irwin Banfield | |||||
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| Number | Date | Patentee | Title | Type | |
| CA-181,459 | Jan. 01, 1918 | W.I. Banfield | Central tubes for shrapnel shells | rockets and grenades | |
| CA-186,201 | Aug. 27, 1918 | W.I. Banfield | Shell fuse hole shipping plug | rockets and grenades | |
| CA-257,304 | Jan. 19, 1926 | W.I. Banfield | Electric switch box | electrical devices | |