| All Patents in class 33/428 |
Patents 1 -
10
of 14
      |
| Picture | Number | Date | Patentee | Title |
 | 82,917 | Oct. 13, 1868 | G.W. Brooks | Centering Square |
 | 89,625 | May 04, 1869 | W.H. Brock | Improvement in adjustable centre-square |
 | 229,283 | Jun. 29, 1880 | L.S. Starrett | Try Square |
 | 249,821 | Nov. 22, 1881 | S.H. Bellows | Combination Square |
 | 477,959 | Jun. 28, 1892 | J.B. Price | Center & Key Seating Rule |
| | 535,223 | Mar. 05, 1895 | W.S. Rowell | Measuring and Drawing Instrument |
 | 567,869 | Sep. 15, 1896 | G.W. Snyder | Combined Rule & Try Square |
 | 587,453 | Aug. 03, 1897 | G.W. Reed | Try and center square |
 | 686,891 | Nov. 19, 1901 | W.A. Dunbar | Center Square |
 | 694,774 | Mar. 04, 1902 | K.O. Muehlberg | Center Square |
