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| Patents for H. B. Vrooman | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,266,186 | May 14, 1918 | F.L. Warnke | Knife | knives and cutters | |
| 1,294,689 | Feb. 18, 1919 | O.H. Mellum | Combination Pliers and Wrench | pliers type wrenches | |
| 1,333,174 | Mar. 09, 1920 | O.H. Henry | Wrench | self-adjust wrenches | |