| All Patents in class 403/380 |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| 628,853 | Jul. 11, 1899 | J.B. Robichan | Steel Square | carpenter squares |
| 765,474 | Jul. 19, 1904 | J.W. Gibbs | Sectional Steel Square | carpenter squares |
| 813,922 | Feb. 27, 1906 | J.H. Williams, C.K. Sitton | Take Down Square | carpenter squares |
| 851,180 | Apr. 23, 1907 | E.T. Mathewson | Adjustable gear | rolling mills |
| 1,049,298 | Dec. 31, 1912 | A.A. Harvie | Knockdown Carpenter's Square | carpenter squares |
| 4,655,655 | Apr. 07, 1987 | H. Schürfeld | Tool and Workpiece Holding Arrangement for Material Removing Machining | insert tool holders |
