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| All Patents in class 33/395 | |||||
| Picture | Number | Date | Patentee | Title | |
| 297,719 | Apr. 29, 1884 | A. Root | Combined Level and Boring Guide | ||
![]() | 1,003,863 | Sep. 19, 1911 | J. Arnet | Listing Indicator | |
![]() | 1,308,795 | Jul. 08, 1919 | W.D. McCormack | Inclinometer for Use on an Aircraft | |