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| Patents for Max Bartholdy | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,404,425 | Jan. 24, 1922 | M. Bartholdy | Surface Gauge | surface gauges | |
| 1,429,556 | Sep. 19, 1922 | M. Bartholdy | Inside Gauge | measurement gauges | |
| 1,465,295 | Aug. 21, 1923 | M. Bartholdy | Caliper Gauge | measurement gauges | |