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| Patents for Waltham Watch Co. | |||||
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| Picture | Number | Date | Patentee | Title | |
| 1,209,359 | Dec. 19, 1916 | N. Tesla | Speed-indicator | ||
| 1,274,816 | Aug. 06, 1918 | N. Tesla | Speed-Indicator | ||
| 1,314,718 | Sep. 02, 1919 | N. Tesla | Ship's Log | ||
| 1,365,547 | Jan. 11, 1921 | N. Tesla | Flow-Meter | ||
| 1,402,025 | Jan. 03, 1922 | N. Tesla | Frequency Meter | ||