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| Patents for John Groetzinger | |||||
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| Number | Date | Patentee | Title | Type | |
| 632,286 | Sep. 05, 1899 | A.A. Snebold | Plumb Bob | plumb bobs | |
| 667,167 | Jan. 29, 1901 | C.W. Hovis | Combined Try Square and Bevel | bevels | |
| 671,789 | Apr. 09, 1901 | C. Borgeson | Wrench | socket wrenches | |
| 691,631 | Jan. 21, 1902 | J.H. Jackson | Spirit Level | line levels | |
| 718,913 | Jan. 20, 1903 | O.W. Cook | Try Square for Die-makers Use | try squares | |